CN110426822B - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN110426822B
CN110426822B CN201910792430.4A CN201910792430A CN110426822B CN 110426822 B CN110426822 B CN 110426822B CN 201910792430 A CN201910792430 A CN 201910792430A CN 110426822 B CN110426822 B CN 110426822B
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lens
optical
optical imaging
image
imaging lens
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CN110426822A (en
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冯涛
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The application discloses an optical imaging lens, which sequentially comprises a first lens with optical power from an object side to an image side along an optical axis, wherein the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a convex surface; the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having optical power; and an eighth lens element having optical power, the object-side surface of which is concave; the maximum half field angle Semi-FOV of the optical imaging lens and the effective focal length f8 of the eighth lens satisfy: 2.4mm≤tan(Semi‑FOV)×|f8|<3.5mm.

Description

Optical imaging lens
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens.
Background
With the continuous development of image pickup apparatuses in recent years, they are being popularized and applied in a variety of fields. At the same time, the imaging quality requirements of the imaging apparatus are also increasing in the market. For example, as a main camera of a mobile terminal device, an optical imaging lens has a development trend of large image plane, large aperture, and ultra-thin, which presents new challenges for the design of an optical system. In the layer-by-layer challenges of optical system design, resolution is an important aspect. The resolution performance of the optical imaging lens greatly affects the imaging quality of the image pickup apparatus. Improving the resolution of an optical imaging lens contributes to improving the imaging quality of an image pickup apparatus. Therefore, an optical imaging lens with high resolution is required.
Disclosure of Invention
An aspect of the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: the first lens is provided with optical power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a convex surface; the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having optical power; and an eighth lens with optical power, wherein the object side surface of the eighth lens is a concave surface.
In one embodiment, the maximum half field angle Semi-FOV of the optical imaging lens and the effective focal length f8 of the eighth lens satisfy: tan (Semi-FOV) 2.4 mm. Ltoreq.tan (Semi-FOV) x|f8| <3.5mm.
In one embodiment, the distance TTL between the object side surface of the first lens element and the imaging surface of the optical imaging lens element on the optical axis and the effective focal length f1 of the first lens element satisfy: 0.5< TTL/|f1| <1.6.
In one embodiment, the maximum effective radius DT32 of the image side surface of the third lens and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy: DT32/DT42 is less than or equal to 0.99.
In one embodiment, an on-axis distance SAG71 from an intersection of the object side surface of the seventh lens and the optical axis to an effective radius vertex of the object side surface of the seventh lens and an on-axis distance SAG72 from an intersection of the image side surface of the seventh lens and the optical axis to an effective radius vertex of the image side surface of the seventh lens satisfy: 0.4< SAG72/SAG71<1.8.
In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy: 0.7< R3/R4<2.0.
In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD <2.
In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens satisfy: R1/R2 is 10 is less than or equal to 0.22.
In one embodiment, the distance T56 between the fifth lens element and the sixth lens element on the optical axis, the distance T67 between the sixth lens element and the seventh lens element on the optical axis, the distance T78 between the seventh lens element and the eighth lens element on the optical axis, and the distance TTL between the object side surface of the first lens element and the imaging surface of the optical imaging lens element on the optical axis satisfy: 0< (T56+T67+T78)/TTL <0.5.
In one embodiment, the center thickness CT6 of the sixth lens on the optical axis and the center thickness CT1 of the first lens on the optical axis satisfy: 0.6< CT6/CT1 < 2.0.
In one embodiment, the center thickness CT5 of the fifth lens on the optical axis and the center thickness CT2 of the second lens on the optical axis satisfy: 0.5< CT5/CT2<1.5.
In one embodiment, the radius of curvature R15 of the object side surface of the eighth lens and the total effective focal length f of the optical imaging lens satisfy: -1< R15/f <0.
The optical imaging lens provided by the application adopts a plurality of lens settings, and comprises a first lens and an eighth lens. Through reasonably setting the interrelationship of the maximum half field angle of the optical imaging lens and the effective focal length of the eighth lens, and optimally setting the surface types of the first lens, the second lens and the eighth lens, the system aberration is balanced and the resolution is improved by reasonably matching each other.
Drawings
Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
Fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 1;
Fig. 3 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 2;
Fig. 5 shows a schematic structural view of an optical imaging lens according to embodiment 3 of the present application;
Fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 3;
Fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 4;
Fig. 9 shows a schematic configuration diagram of an optical imaging lens according to embodiment 5 of the present application;
Fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 5;
fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application;
Fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 6;
fig. 13 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 7 of the present application;
Fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 7;
Fig. 15 shows a schematic structural view of an optical imaging lens according to embodiment 8 of the present application;
fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 8;
Fig. 17 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 9 of the present application;
Fig. 18A to 18D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 9;
fig. 19 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 10 of the present application;
Fig. 20A to 20D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 10.
Detailed Description
For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens according to the exemplary embodiment of the present application may include eight lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses are arranged in order from the object side to the image side along the optical axis.
In an exemplary embodiment, the first lens may have positive optical power, with an object-side surface being convex and an image-side surface being convex; the second lens can have positive focal power or negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens may have positive or negative optical power; the fourth lens may have positive or negative optical power; the fifth lens may have positive or negative optical power; the sixth lens may have positive optical power; the seventh lens may have positive or negative optical power; and the eighth lens element may have negative optical power with a concave object-side surface. The focal power and the surface area of each lens in the optical system are reasonably matched, so that the aberration of the optical system can be effectively balanced, and the imaging quality is improved. The maximum half field angle Semi-FOV of the optical imaging lens and the effective focal length f8 of the eighth lens satisfy: tan (Semi-FOV) 2.4 mm. Ltoreq.tan (Semi-FOV) x|f8| <3.5mm. The product relation between the tangent value of the maximum half field angle of the optical imaging lens and the absolute value of the effective focal length of the eighth lens is reasonably set, so that the effective focal length of the eighth lens is controlled within a reasonable focal length range, the lens shape of the eighth lens is controlled, the aberration of the system is balanced, and the resolution is improved.
In an exemplary embodiment, the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis and the effective focal length f1 of the first lens satisfy: 0.5< TTL/|f1| <1.6, preferably 0.6< TTL/|f1| <1.5. The ratio of the total length of the optical system to the absolute value of the effective focal length of the first lens is set within a reasonable numerical range, so that the total length of the optical system is effectively controlled, and the miniaturization of the optical system is facilitated.
In an exemplary embodiment, the maximum effective radius DT32 of the image side surface of the third lens and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy: DT32/DT42 is less than or equal to 0.99. The ratio of the maximum effective radius of the image side surface of the third lens to the maximum effective radius of the image side surface of the fourth lens is less than or equal to 0.99, which is beneficial to improving the assembly manufacturability of the lens, correcting off-axis aberration and improving image quality.
In the exemplary embodiment, the on-axis distance SAG71 from the intersection of the object side surface of the seventh lens and the optical axis to the effective radius vertex of the object side surface of the seventh lens and the on-axis distance SAG72 from the intersection of the image side surface of the seventh lens and the optical axis to the effective radius vertex of the image side surface of the seventh lens satisfy: 0.4< SAG72/SAG71<1.8. And the proportional relation between the axial distance from the intersection point of the object side surface of the seventh lens and the optical axis to the vertex of the effective radius of the object side surface of the seventh lens and the axial distance from the intersection point of the image side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image side surface of the seventh lens is reasonably set, so that the ghost image energy generated by the reflection of the object side surface and the image side surface of the seventh lens is reduced, and the risk of ghost images is reduced.
In an exemplary embodiment, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy: 0.7< R3/R4<2.0, preferably 1.0< R3/R4<1.8. The ratio of the curvature radius of the object side surface of the second lens to the curvature radius of the image side surface of the second lens is set within a reasonable numerical range, so that astigmatism in the arc-losing direction of the optical system can be corrected.
In an exemplary embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD <2. The proportional relation between the total effective focal length of the optical imaging lens and the entrance pupil diameter of the optical imaging lens is reasonably set, so that the optical system has the advantage of a large aperture while the surface type and the focal power of each lens set in the embodiment are met, and the imaging effect of the optical system in a weak light environment is enhanced. Meanwhile, the above relation arrangement is beneficial to reducing the aberration of the field of view at the edge of the optical system, obtaining the shooting effect of virtual and real frames and highlighting the shooting main body.
In an exemplary embodiment, the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: R1/R2 10 is less than or equal to 0.22, preferably 0.10 is less than or equal to R1/R2 10 is less than or equal to 0.22. And the proportional relation between the curvature radius of the object side surface of the first lens and the curvature radius of the image side surface of the first lens is reasonably set, so that the Petzval field curve of the optical system can be corrected.
In the exemplary embodiment, the separation distance T56 of the fifth lens and the sixth lens on the optical axis, the separation distance T67 of the sixth lens and the seventh lens on the optical axis, the separation distance T78 of the seventh lens and the eighth lens on the optical axis, and the distance TTL of the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfy: 0< (t56+t67+t78)/TTL <0.5, preferably 0.1< (t56+t67+t78)/TTL <0.4. The distance between the fifth lens and the sixth lens on the optical axis, the distance between the sixth lens and the seventh lens on the optical axis, the distance between the seventh lens and the eighth lens on the optical axis and the proportional relation between the sum of the distance, the distance and the total length of the optical system are reasonably set, so that the lens assembly is guaranteed, the total length of the system is reduced, the uniform distribution of the lenses is guaranteed, the miniaturization of the system is realized, the off-axis aberration is effectively corrected, the risk of ghost images is reduced, and the imaging quality of the optical system is improved.
In the exemplary embodiment, the center thickness CT6 of the sixth lens on the optical axis and the center thickness CT1 of the first lens on the optical axis satisfy: 0.6< CT6/CT1 < 2.0, preferably 0.9< CT6/CT1 < 1.8. The proportional relation between the center thickness of the sixth lens on the optical axis and the center thickness of the first lens on the optical axis is reasonably set, so that the molding manufacturability of the lens is improved, and the miniaturization of the lens is realized.
In an exemplary embodiment, the center thickness CT5 of the fifth lens on the optical axis and the center thickness CT2 of the second lens on the optical axis satisfy: 0.5< CT5/CT2<1.5, preferably 0.7< CT5/CT2<1.3. The proportional relation between the center thickness of the fifth lens on the optical axis and the center thickness of the second lens on the optical axis is reasonably set, so that the optical lens is ultra-thin, and astigmatism in the meridian direction and the arc loss direction of the field of view outside the optical system is corrected.
In an exemplary embodiment, the radius of curvature R15 of the object side surface of the eighth lens and the total effective focal length f of the optical imaging lens satisfy: -1< R15/f <0. The curvature radius of the object side surface of the eighth lens is reasonably set, so that the ratio of the curvature radius of the object side surface of the eighth lens to the total effective focal length of the optical imaging lens is in a reasonable numerical range, the adjustment of the light incidence angle of the lens and the matching of chips CRA (CHIEF RAY ANGLE and the inclination angle of principal ray) are facilitated, and the correction of system astigmatism and the reduction of distortion are facilitated.
In an exemplary embodiment, the optical imaging lens may further include a diaphragm. The diaphragm may be provided at an appropriate position as required. For example, a diaphragm may be provided between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.
In an exemplary embodiment, at least one of the mirrors of each lens is an aspherical mirror, i.e., at least one of the object side surface of the first lens to the image side surface of the eighth lens is an aspherical mirror. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, at least one of an object side surface and an image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are aspherical mirror surfaces.
The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens described above.
Exemplary embodiments of the present application also provide an electronic apparatus including the imaging device described above.
However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solution claimed in the present application. For example, although eight lenses are described as an example in the embodiment, the optical imaging lens is not limited to include eight lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 1 shows the basic parameter table of the optical imaging lens of embodiment 1, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 1
In the present embodiment, the total effective focal length f=4.11 mm of the optical imaging lens, the distance ttl=5.40 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17, half of the diagonal length imgh=3.60 mm of the effective pixel area on the imaging surface S17, the maximum half field angle Semi-fov= 40.52 ° of the optical imaging lens, and the f-number fno=1.70 of the optical imaging lens.
In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are aspherical, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
Wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The following Table 2 shows the higher order coefficients A 4、A6、A8、A10、A12、A14 and A 16 that can be used for each of the aspherical mirrors S1-S16 in example 1.
TABLE 2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 2B shows an astigmatism curve of the optical imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens provided in embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. Fig. 3 shows a schematic configuration of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f=4.04 mm of the optical imaging lens, the distance ttl=5.40 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17, half of the diagonal length imgh=3.60 mm of the effective pixel area on the imaging surface S17, the maximum half field angle Semi-fov= 40.29 ° of the optical imaging lens, and the f-number fno=1.75 of the optical imaging lens.
Table 3 shows the basic parameter table of the optical imaging lens of embodiment 2, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 3 Table 3
In embodiment 2, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The following Table 4 shows the higher order coefficients A 4、A6、A8、A10、A12、A14 and A 16 that can be used for each of the aspherical mirrors S1-S16 in example 2.
Face number A4 A6 A8 A10 A12 A14 A16
S1 -1.3243E-03 7.2468E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 8.8015E-03 -2.1862E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 -7.8913E-02 6.6630E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -9.3566E-02 6.5523E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 -4.5440E-03 2.6483E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 -3.4619E-02 4.1779E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 -3.5153E-02 1.7719E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S8 -6.2194E-02 5.3041E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S9 -6.3098E-02 6.2792E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S10 -4.9230E-02 2.1421E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S11 -4.9960E-02 1.0157E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S12 -5.7685E-02 4.2510E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S13 -6.7584E-02 -3.7375E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S14 -2.1605E-02 1.9651E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S15 -2.0131E-02 4.0336E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S16 -2.0422E-02 5.7525E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
TABLE 4 Table 4
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 4B shows an astigmatism curve of the optical imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens provided in embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic configuration diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has negative refractive power, wherein the object-side surface S13 is concave, and the image-side surface S14 is concave. The eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f=4.26 mm of the optical imaging lens, the distance ttl=5.35 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17, half of the diagonal length imgh=3.60 mm of the effective pixel area on the imaging surface S17, the maximum half field angle Semi-fov= 38.98 ° of the optical imaging lens, and the f-number fno=1.95 of the optical imaging lens.
Table 5 shows the basic parameter table of the optical imaging lens of embodiment 3, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 5
In embodiment 3, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The higher order coefficients A 4、A6、A8、A10、A12、A14、A16、A18 and A 20 that can be used for each of the aspherical mirrors S1-S16 in example 3 are given in Table 6 below.
Face number A4 A6 A8 A10 A12 A14 A16
S1 -1.5964E-03 7.0410E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 5.6287E-03 -1.8882E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 -8.4616E-02 3.5720E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -9.4949E-02 5.2980E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 -2.3175E-02 1.9733E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 -4.8771E-02 2.9341E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 -1.0648E-02 2.7154E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S8 -6.3778E-02 8.7483E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S9 -6.5275E-02 5.9738E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S10 -2.0524E-02 3.3408E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S11 -4.4133E-02 1.6995E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S12 -5.5826E-02 3.8386E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S13 -7.5572E-02 -1.2881E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S14 -2.8918E-02 1.8221E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S15 -1.2630E-02 2.1398E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S16 -1.4424E-02 -1.1333E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
TABLE 6
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the optical imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens provided in embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is concave and an image-side surface S12 thereof is convex. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f=4.06 mm of the optical imaging lens, the distance ttl=5.40 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17, half of the diagonal length imgh=3.60 mm of the effective pixel area on the imaging surface S17, the maximum half field angle Semi-fov= 40.20 ° of the optical imaging lens, and the f-number fno=1.85 of the optical imaging lens.
Table 7 shows a basic parameter table of the optical imaging lens of example 4, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 7
In embodiment 4, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The higher order coefficients A 4、A6、A8、A10、A12、A14 and A 16 that can be used for each of the aspherical mirrors S1-S16 in example 4 are given in Table 8 below.
TABLE 8
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve of the optical imaging lens of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens provided in embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic configuration of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is concave and an image-side surface S12 thereof is convex. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f=4.25 mm of the optical imaging lens, the distance ttl=5.40 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17, half of the diagonal length imgh=3.60 mm of the effective pixel area on the imaging surface S17, the maximum half field angle Semi-fov=38.89° of the optical imaging lens, and the f-number fno=1.75 of the optical imaging lens.
Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 9
In embodiment 5, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The following Table 10 shows the higher order coefficients A 4、A6、A8、A10、A12、A14 and A 16 that can be used for each of the aspherical mirrors S1-S16 in example 5.
Face number A4 A6 A8 A10 A12 A14 A16
S1 2.3628E-03 4.5364E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 9.0878E-03 -1.6357E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 -7.7102E-02 8.7435E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -8.7650E-02 1.3781E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 2.4974E-02 3.1256E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 -7.9727E-03 4.7399E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 -3.5990E-02 1.7044E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S8 -5.7249E-02 -4.8772E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S9 -5.5525E-02 -7.8563E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S10 -3.5974E-02 1.0531E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S11 -1.6383E-02 6.6994E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S12 -5.1285E-02 7.5788E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S13 -8.4067E-02 1.8113E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S14 -1.6806E-02 1.4382E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S15 7.9906E-03 9.4663E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S16 -1.2989E-02 7.3245E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
Table 10
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve of the optical imaging lens of embodiment 5, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens provided in embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural diagram of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f=4.09 mm of the optical imaging lens, the distance ttl=5.40 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17, half of the diagonal length imgh=3.60 mm of the effective pixel area on the imaging surface S17, the maximum half field angle Semi-fov=39.99° of the optical imaging lens, and the f-number fno=1.75 of the optical imaging lens.
Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 11
In embodiment 6, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The following Table 12 shows the higher order coefficients A 4、A6、A8、A10、A12、A14 and A 16 that can be used for each of the aspherical mirrors S1-S16 in example 6.
Face number A4 A6 A8 A10 A12 A14 A16
S1 2.0093E-03 -3.6158E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 7.7330E-03 -1.2877E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 -8.2471E-02 7.5462E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -9.0384E-02 9.3377E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 3.3758E-02 2.6295E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 -2.8310E-04 4.2237E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 -5.3067E-02 2.1071E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S8 -5.3120E-02 -2.1280E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S9 -4.4478E-02 5.5192E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S10 -6.0172E-02 2.2854E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S11 -4.6127E-02 9.4741E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S12 -4.2906E-02 1.7059E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S13 -7.2349E-02 -3.3446E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S14 -3.4065E-02 1.0015E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S15 -1.8390E-02 2.9958E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S16 -1.7297E-02 2.1585E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
Table 12
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve of the optical imaging lens of embodiment 6, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens provided in embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 shows a schematic configuration diagram of an optical imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f=3.80 mm of the optical imaging lens, the distance ttl=5.35 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17, half of the diagonal length imgh=3.60 mm of the effective pixel area on the imaging surface S17, the maximum half field angle Semi-fov= 42.08 ° of the optical imaging lens, and the f-number fno=1.90 of the optical imaging lens.
Table 13 shows a basic parameter table of the optical imaging lens of embodiment 7, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 13
In embodiment 7, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The following Table 14 shows the higher order coefficients A 4、A6、A8、A10、A12、A14 and A 16 that can be used for each of the aspherical mirrors S1-S16 in example 7.
Face number A4 A6 A8 A10 A12 A14 A16
S1 1.2767E-02 -1.5327E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 -7.5515E-04 -8.6227E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 -9.8366E-02 -1.3436E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -1.0695E-01 -2.2611E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 5.6802E-03 5.5989E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 -2.0879E-02 8.9219E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 -7.0666E-02 8.0773E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S8 -4.8583E-02 -6.1263E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S9 -2.0115E-02 1.1411E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S10 -6.8171E-02 3.6057E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S11 -8.2364E-02 1.5325E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S12 -7.2696E-02 8.4914E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S13 -6.9786E-02 -1.5138E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S14 -1.9611E-02 -1.3332E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S15 -1.0378E-02 1.2793E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S16 -1.7184E-02 1.6568E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
TABLE 14
Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve of the optical imaging lens of embodiment 7, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 14D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens provided in embodiment 7 can achieve good imaging quality.
Example 8
An optical imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural diagram of an optical imaging lens according to embodiment 8 of the present application.
As shown in fig. 15, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f=3.94 mm of the optical imaging lens, the distance ttl=5.30 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17, half of the diagonal length imgh=3.55 mm of the effective pixel area on the imaging surface S17, the maximum half field angle Semi-fov=40.60° of the optical imaging lens, and the f-number fno=1.70 of the optical imaging lens.
Table 15 shows a basic parameter table of the optical imaging lens of example 8, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 15
In embodiment 8, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The following Table 16 shows the higher order coefficients A 4、A6、A8、A10、A12、A14 and A 16 that can be used for each of the aspherical mirrors S1-S16 in example 8.
Face number A4 A6 A8 A10 A12 A14 A16
S1 3.9013E-03 3.0208E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 1.6126E-02 -3.8715E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 -7.4046E-02 1.0671E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -8.7389E-02 1.0115E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 4.3291E-02 -9.7267E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 1.2935E-02 1.9029E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 -4.5179E-02 2.8780E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S8 -3.4707E-02 -3.7612E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S9 -5.3523E-02 1.5658E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S10 -8.5567E-02 3.1268E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S11 -6.3498E-02 1.1542E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S12 -6.3925E-02 2.4641E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S13 -6.1577E-02 -1.4187E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S14 -1.6538E-02 -1.2214E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S15 -2.9092E-02 5.9978E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S16 -2.3197E-02 7.4625E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
Table 16
Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve of the optical imaging lens of embodiment 8, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 16C shows a distortion curve of the optical imaging lens of embodiment 8, which represents distortion magnitude values corresponding to different image heights. Fig. 16D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 16A to 16D, the optical imaging lens provided in embodiment 8 can achieve good imaging quality.
Example 9
An optical imaging lens according to embodiment 9 of the present application is described below with reference to fig. 17 to 18D. Fig. 17 shows a schematic configuration diagram of an optical imaging lens according to embodiment 9 of the present application.
As shown in fig. 17, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is concave. The eighth lens element E8 has negative refractive power, wherein an object-side surface S15 thereof is concave and an image-side surface S16 thereof is convex. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f=4.25 mm of the optical imaging lens, the distance ttl=5.40 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17, half of the diagonal length imgh=3.55 mm of the effective pixel area on the imaging surface S17, the maximum half field angle Semi-fov=38.48° of the optical imaging lens, and the f-number fno=1.80 of the optical imaging lens.
Table 17 shows a basic parameter table of the optical imaging lens of embodiment 9, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 17
In embodiment 9, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The following Table 18 shows the higher order coefficients A 4、A6、A8、A10、A12、A14 and A 16 that can be used for each of the aspherical mirrors S1-S16 in example 9.
TABLE 18
Fig. 18A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 9, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 18B shows an astigmatism curve of the optical imaging lens of embodiment 9, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 18C shows a distortion curve of the optical imaging lens of embodiment 9, which represents distortion magnitude values corresponding to different image heights. Fig. 18D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 9, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 18A to 18D, the optical imaging lens provided in embodiment 9 can achieve good imaging quality.
Example 10
An optical imaging lens according to embodiment 10 of the present application is described below with reference to fig. 19 to 20D. Fig. 19 shows a schematic structural diagram of an optical imaging lens according to embodiment 10 of the present application.
As shown in fig. 19, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, eighth lens E8, filter E9, and imaging plane S19.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has positive refractive power, wherein an object-side surface S11 thereof is convex, and an image-side surface S12 thereof is convex. The seventh lens element E7 has positive refractive power, wherein an object-side surface S13 thereof is convex, and an image-side surface S14 thereof is convex. The eighth lens element E8 has negative refractive power, and has a concave object-side surface S15 and a concave image-side surface S16. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f=4.12 mm of the optical imaging lens, the distance ttl=5.40 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S17, half of the diagonal length imgh=3.60 mm of the effective pixel area on the imaging surface S17, the maximum half field angle Semi-fov=39.74° of the optical imaging lens, and the f-number fno=1.45 of the optical imaging lens.
Table 19 shows a basic parameter table of the optical imaging lens of embodiment 10, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 19
In embodiment 10, the object side surface and the image side surface of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces. The following Table 20 shows the higher order coefficients A 4、A6、A8、A10、A12、A14 and A 16 that can be used for each of the aspherical mirrors S1-S16 in example 10.
Face number A4 A6 A8 A10 A12 A14 A16
S1 -2.2656E-04 -3.1293E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 7.9438E-03 -5.2711E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 -7.2819E-02 1.2280E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 -8.0804E-02 1.0777E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 3.6764E-02 2.2285E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 9.7322E-04 3.9777E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 -8.8823E-02 1.1784E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S8 -7.1916E-02 7.1887E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S9 -3.4229E-02 8.8164E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S10 -9.7309E-02 2.3718E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S11 -8.3945E-02 1.4453E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S12 -7.3609E-02 3.2746E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S13 -9.2498E-02 4.0307E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S14 -2.9930E-02 2.6860E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S15 -1.9892E-02 4.2181E-03 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S16 -2.0002E-02 1.9515E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
Table 20
Fig. 20A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 10, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 20B shows an astigmatism curve of the optical imaging lens of embodiment 10, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 20C shows a distortion curve of the optical imaging lens of embodiment 10, which represents distortion magnitude values corresponding to different image heights. Fig. 20D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 10, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 20A to 20D, the optical imaging lens provided in embodiment 10 can achieve good imaging quality.
In summary, examples 1 to 10 satisfy the relationships shown in table 21, respectively.
Table 21
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (9)

1. An optical imaging lens, comprising, in order from an object side to an image side along an optical axis:
the first lens with positive focal power has a convex object side surface and a convex image side surface;
the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;
A third lens having optical power;
A fourth lens having optical power;
A fifth lens having optical power;
a sixth lens having positive optical power;
A seventh lens having optical power; and
An eighth lens with negative focal power, the object side surface of which is a concave surface; wherein,
The number of lenses having optical power in the optical imaging lens is eight;
The third lens, the fifth lens and the seventh lens each have positive optical power, and at least one of the second lens and the fourth lens has negative optical power; or alternatively
The third lens, the fourth lens and the seventh lens each have positive optical power, and the second lens and the fifth lens each have negative optical power; or alternatively
The second lens and the third lens both have negative focal power, the positive and negative focal power attributes of the fourth lens and the fifth lens are opposite, and the positive and negative focal power attributes of the fourth lens and the seventh lens are the same;
The maximum half field angle Semi-FOV of the optical imaging lens and the effective focal length f8 of the eighth lens satisfy:
2.4mm≤tan(Semi-FOV)×|f8|<3.5mm；
the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy the following conditions:
R1/R2 is more than or equal to 0.10 and is more than or equal to 10 and is less than or equal to 0.22; and
The center thickness CT6 of the sixth lens on the optical axis and the center thickness CT1 of the first lens on the optical axis satisfy: 0.6< CT6/CT1<2.0.
2. The optical imaging lens as claimed in claim 1, wherein a distance TTL from an object side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis and an effective focal length f1 of the first lens satisfy:
0.5<TTL/|f1|<1.6。
3. The optical imaging lens of claim 1, wherein a maximum effective radius DT32 of an image side surface of the third lens and a maximum effective radius DT42 of an image side surface of the fourth lens satisfy:
0.84≤DT32/DT42≤0.99。
4. The optical imaging lens of claim 1, wherein an on-axis distance SAG71 from an intersection of the object side surface of the seventh lens and the optical axis to an effective radius vertex of the object side surface of the seventh lens and an on-axis distance SAG72 from an intersection of the image side surface of the seventh lens and the optical axis to an effective radius vertex of the image side surface of the seventh lens satisfy:
0.4<SAG72/SAG71<1.8。
5. the optical imaging lens of claim 1, wherein a radius of curvature R3 of an object side surface of the second lens and a radius of curvature R4 of an image side surface of the second lens satisfy:
0.7<R3/R4<2.0。
6. the optical imaging lens of claim 1, wherein a total effective focal length f of the optical imaging lens and an entrance pupil diameter EPD of the optical imaging lens satisfy:
1.45≤f/EPD<2。
7. The optical imaging lens according to claim 1, wherein a separation distance T56 of the fifth lens and the sixth lens on the optical axis, a separation distance T67 of the sixth lens and the seventh lens on the optical axis, a separation distance T78 of the seventh lens and the eighth lens on the optical axis, and a distance TTL of an object side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis satisfy:
0< (T56+T67+T78)/TTL<0.5。
8. The optical imaging lens according to claim 1, wherein a center thickness CT5 of the fifth lens on the optical axis and a center thickness CT2 of the second lens on the optical axis satisfy:
0.5<CT5/CT2<1.5。
9. the optical imaging lens of claim 1, wherein a radius of curvature R15 of an object side surface of the eighth lens and a total effective focal length f of the optical imaging lens satisfy:
-1<R15/f<0。
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