CN115127083B - Internal sawtooth Fresnel navigation mark lamp optical lens and navigation mark lamp - Google Patents
Internal sawtooth Fresnel navigation mark lamp optical lens and navigation mark lamp Download PDFInfo
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- CN115127083B CN115127083B CN202210677955.5A CN202210677955A CN115127083B CN 115127083 B CN115127083 B CN 115127083B CN 202210677955 A CN202210677955 A CN 202210677955A CN 115127083 B CN115127083 B CN 115127083B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 71
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000004323 axial length Effects 0.000 claims description 3
- 239000011324 bead Substances 0.000 abstract description 7
- 238000002834 transmittance Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000003491 array Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000009537 plain noodles Nutrition 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
- F21V5/046—Refractors for light sources of lens shape the lens having a rotationally symmetrical shape about an axis for transmitting light in a direction mainly perpendicular to this axis, e.g. ring or annular lens with light source disposed inside the ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V31/00—Gas-tight or water-tight arrangements
- F21V31/005—Sealing arrangements therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
- F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
- F21W2111/04—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for waterways
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention belongs to the technical field of optical application of navigation mark lamps, and discloses an inner sawtooth Fresnel navigation mark lamp optical lens and a navigation mark lamp. The optical lens is integrally a hollow cylinder with central rotation symmetry, the light inlet part and the reflecting part form the inner side surface of the hollow cylinder and are in a sawtooth shape, and the light outlet part forms the outer side surface of the hollow cylinder and is a smooth surface; the light inlet part is provided with a containing cavity for containing the light source array, and the light source array is annularly arranged and arranged on the reference surface. The invention provides a navigation mark lamp which comprises a sealing plate, a light source array and an inner sawtooth Fresnel navigation mark lamp optical lens. The invention solves the problems that the light transmittance is influenced by the fact that the beacon light lens in the prior art is only suitable for an LED lamp bead array with specific arrangement characteristics and the outer surface of the beacon light lens is extremely easy to pollute, and the beacon light has larger volume and lower light transmittance, and achieves the technical effects of strong applicability, higher light transmittance, difficult pollution and easy cleaning and maintenance.
Description
Technical Field
The invention relates to the technical field of navigation mark lamp optical application, in particular to an internal sawtooth Fresnel navigation mark lamp optical lens and a navigation mark lamp.
Background
The navigation mark lamp is one of important facilities for guaranteeing the night navigation safety of the ship, is usually deployed along a navigation channel, flashes at night according to a certain rhythm, indicates the channel condition for the ship to come and go, and provides navigation assistance service for night navigation workers. According to standard standards such as 'color of navigation mark light signal' of GB 12708-2020 and 'light intensity measurement and light range calculation of JT/T730-2008' in China, the navigation mark light emits light with specified color (color type, chromaticity area and the like) and flash frequency at night, and a specified irradiation angle and a specified visible distance are required to be achieved.
When the lenses are assembled into the navigation light cap, 6-8 LED lamp beads are generally arranged in a circular array and used as light sources, and a corresponding number of lens units are assembled in a circumferential arrangement at certain angles so as to ensure uniform light intensity in a 360-degree range and ensure waterproof performance and lens cleanliness; however, the structure causes that the existing navigation mark lamp lens is only applicable to a corresponding light source array, namely, when facing to light source arrays with different LED lamp bead numbers, different lens unit arrays are required to be installed; and dust and oil stains are easily deposited on the surface of the Fresnel lens with the external saw teeth, so that the transmissivity of lamplight is influenced. In order to prevent dust and greasy dirt, the transparent lampshade which is smooth and sealed is usually additionally arranged outside the lens, but the lampshade is additionally arranged, so that the size of the navigation mark lamp is increased, the occupied space is increased, the light transmittance can be influenced by the lampshade, and the light energy is lost.
Disclosure of Invention
The invention provides the inner sawtooth Fresnel navigation mark lamp optical lens and the navigation mark lamp, which solve the problems that the navigation mark lamp lens in the prior art can only be suitable for an LED lamp bead array with specific arrangement characteristics, the outer surface of the navigation mark lamp lens is extremely easy to pollute, the light transmittance is influenced, the volume of the navigation mark lamp is larger, and the light transmittance is lower.
The technical scheme adopted by the invention is as follows: the utility model provides an interior sawtooth Fresnel navigation mark lamp optical lens, wholly is the hollow cylinder of central rotational symmetry, including income light part, reflection part and light-emitting part, reflection part connect in go out between light part and the income light part, go into light part with the reflection part constitutes hollow cylinder's medial surface, go into light part and be concave sawtooth shape, reflection part is total reflection surface, reflection part includes two reflecting surfaces that set up about the reference plane symmetry, every the reflecting surface is the annular curved surface of evagination form, light-emitting part constitutes hollow cylinder's lateral surface, the lateral surface is the plain noodles; the plane perpendicular to the central rotation axis of the hollow cylinder and intersecting the central rotation axis at the central point of the hollow cylinder is taken as a reference plane, and the light incident part, the reflecting part and the light emergent part are all bilaterally symmetrical to the reference plane; the light inlet part forms a containing cavity for containing a light source array, the light source array is composed of a plurality of identical light sources, the light source array is annularly arranged and arranged on the reference surface, the optical axes of all the light sources are arranged on the reference surface, the optical axes of all the light sources pass through the center point of the hollow cylinder, and the light rays of all the light sources are emitted to the direction far away from the center point of the hollow cylinder; the inner side surface is used for compressing the light rays emitted by the light source array to a preset angle range in the axial direction of the central rotating shaft, and the light rays compressed by the inner side surface are uniformly distributed in the reference surface after exiting from the outer side surface.
Preferably, the light incident portion includes a first light incident surface and a second light incident surface, the first light incident surface is used as a bottom arm of the accommodating cavity, and the second light incident surface is used as a side arm of the accommodating cavity; the two side arms are respectively connected with the bottom arm and are symmetrical relative to the reference plane; the reflecting part comprises two reflecting surfaces which are symmetrically arranged about the reference surface, and each reflecting surface is respectively connected with the outer end of one second light incident surface.
Preferably, the first light incident surface is composed of a first fresnel refraction surface, a second fresnel refraction surface and a third fresnel refraction surface; the first Fresnel refraction surface is intersected with the reference surface, and is an annular plane perpendicular to the reference surface; the second Fresnel refraction surface is two groups of concave annular curved surfaces which are symmetrically arranged about the reference surface, and the two groups of annular curved surfaces are respectively connected with two ends of the first Fresnel refraction surface; the third Fresnel refraction surface is two groups of concave annular sawtooth steps symmetrically arranged relative to the reference surface, one end of each group of annular sawtooth steps is connected with the outer end of one group of annular curved surfaces, and the other end of each group of annular sawtooth steps is connected with one second light incident surface.
Preferably, the focal point of the second fresnel refractive surface is located on the reference surface, and all the light sources are located at the focal point positions of the second fresnel refractive surface.
Preferably, the projection of the connection part of the reflecting surface and the second light incident surface on the reference surface coincides with the projection of the light source array on the reference surface.
Preferably, each group of annular sawtooth steps consists of an inner annular inclined plane and an outer annular inclined plane, one end of the inner annular inclined plane intersects with one end of the outer annular inclined plane at the tooth tip position of the sawtooth, the other end of the inner annular inclined plane intersects with the second Fresnel refraction surface, the outer annular inclined plane intersects with the second light incident surface, the sawtooth angle of each annular sawtooth step is a first angle, the first angle is 10 degrees to 60 degrees, the radial length of the inner annular inclined plane at the central rotating shaft is a first distance, the axial length of each group of annular sawtooth steps at the central rotating shaft is a second distance, the first distance is 0.5-3mm, and the second distance is 1.5-3mm.
Preferably, the second light incident surface is an annular plane or an annular inclined plane, and the annular plane is parallel to the reference surface.
Preferably, when the second light incident surface is an annular inclined surface, as the distance in the radial direction of the central rotation shaft increases, the distance between the two groups of annular inclined surfaces in the axial direction of the central rotation shaft decreases, and the included angle between the second light incident surface and the reference surface is a second angle, where the second angle is greater than 0 ° and less than or equal to 45 °.
Preferably, the inner sawtooth Fresnel navigation mark lamp optical lens is integrally formed or formed by splicing a plurality of identical equally-divided cylindrical lens units.
On the other hand, the invention also provides a navigation mark lamp, which comprises a sealing plate, the light source array and the inner sawtooth Fresnel navigation mark lamp optical lens, and is characterized in that the inner sawtooth Fresnel navigation mark lamp optical lens is used for distributing light beams emitted by the light source array; the sealing plate is detachably arranged on the top surface and the bottom surface of the inner sawtooth Fresnel navigation mark lamp optical lens, the sealing plate and the outer side surface of the inner sawtooth Fresnel navigation mark lamp optical lens jointly form a cylinder, and the sealing plate is provided with a light source mounting hole capable of being opened and closed.
Compared with the prior art and products, the invention has the following beneficial effects:
1. the inner sawtooth Fresnel navigation mark lamp optical lens provided by the invention is a hollow cylinder with central rotation symmetry, the light emergent part forms the outer side surface of the hollow cylinder and is a smooth surface, and as the outer side surface of the optical lens is a smooth cylinder side surface, a certain number of light sources within a certain range can be arranged in a containing cavity arranged on the light emergent part instead of the fixed number of light sources which are required to be arranged as in the prior art, namely the inner sawtooth Fresnel navigation mark lamp optical lens can be suitable for various annular light source arrays formed by at least 2 light sources. Because the outer side surface of the optical lens is a smooth cylinder side surface, compared with the prior art, the outer side surface of the optical lens is easier to clean and maintain. In addition, the light inlet part and the reflecting part of the inner sawtooth Fresnel navigation mark lamp optical lens form the inner side surface of the hollow cylinder, and the light inlet part is in a sawtooth shape, namely, the sawtooth surface is positioned on the inner surface, and dust and greasy dirt are not deposited on the sawtooth structure surface in the use process after the top opening and the bottom opening of the lens are sealed, so that compared with the prior art, the sawtooth surface is not easy to pollute and is easy to clean and maintain.
2. In the invention, the focal point of the second Fresnel refraction surface is positioned on the reference surface, and all the light sources are positioned at the focal point of the second Fresnel refraction surface, so that the best condensing effect of the paraxial light rays emitted by the light sources can be obtained.
3. In the invention, the projection of the connection position of the reflecting surface and the third Fresnel refraction surface on the reference surface coincides with the projection of the light source array on the reference surface, so that the light rays emitted by all the light sources within the angle range of-90 degrees to 90 degrees can be gathered, and the utilization rate of light energy can be further improved.
4. The inner sawtooth Fresnel navigation mark lamp optical lens provided by the invention can be integrally formed, has a simple structure, simplifies production and assembly procedures, and reduces production cost. The inner sawtooth Fresnel navigation mark lamp optical lens provided by the invention can also be formed by splicing a plurality of identical equally-divided cylindrical lens units, is flexible in structural design and can reduce the production difficulty.
5. The sealing plate is arranged on the top surface and the bottom surface of the inner sawtooth Fresnel navigation mark lamp optical lens, so that the sealing and waterproof requirements of the navigation mark lamp can be met, and a lampshade is not required to be additionally arranged for guaranteeing the waterproof performance and the cleanness of the lens.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of an intra-sawtooth Fresnel navigation mark lamp optical lens in the XZ plane provided in embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of a third Fresnel refractive surface sawtooth step in an XZ plane in an internal sawtooth Fresnel navigation mark lamp optical lens according to embodiment 1 of the present invention;
FIG. 3 is a schematic view of an optical path of a first light incident surface in an XZ plane in an optical lens of an intra-sawtooth Fresnel navigation mark lamp according to embodiment 1 of the present invention;
FIG. 4 is a schematic view of an optical path of the second light incident surface and the reflective portion in the XZ plane in the optical lens of the sawtooth Fresnel navigation mark lamp according to the embodiment 1 of the present invention;
FIG. 5 is a perspective view of a lens unit obtained by rotating the cross-sectional structure of an intra-sawtooth Fresnel navigation mark lamp optical lens in the XZ plane by 180 DEG around a central rotation axis provided in embodiment 1 of the present invention;
FIG. 6 is a plot of the coordinates of a cross-sectional structure of an intra-sawtooth Fresnel navigation mark lamp optical lens in the XZ plane provided by embodiment 1 of the present invention;
fig. 7 is a schematic installation diagram of a light source array formed by a lens unit and 6 LED beads of the navigation mark lamp according to embodiment 2 of the present invention;
fig. 8 is a schematic diagram of a light source array formed by 6 LED beads installed in a beacon light provided in embodiment 2 of the present invention;
FIG. 9 is a graph of spot illuminance distribution of a navigation mark lamp according to example 2 of the present invention in the XZ plane direction at a receiving surface distance of 1500mm by optical software simulation;
Fig. 10 is a graph showing the light intensity distribution of a navigation mark lamp on the YZ plane according to embodiment 2 of the present invention by optical software simulation.
Wherein: 1-light inlet, 11-first light inlet, 12-second light inlet, 111-first Fresnel refraction surface, 112-second Fresnel refraction surface, 113-third Fresnel refraction surface, 2-reflection part, 3-light outlet and 4-light source.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1:
In order to facilitate clearer display of the internal structure and the condensation principle of the inner sawtooth fresnel navigation light optical lens, as shown in fig. 1,2, 3 and 4, a cross-sectional view of the inner sawtooth fresnel navigation light optical lens in an XZ plane is taken, the X axis is the central rotation axis, the Z axis is the optical axis of any light source 4, and the X axis, the Y axis and the Z axis are three orthogonal axes in space respectively.
Embodiment 1 provides an inner sawtooth fresnel lens, as shown in fig. 1-7, the inner sawtooth fresnel lens is a hollow cylinder with central rotational symmetry, and comprises a light inlet part 1, a reflecting part 2 and a light outlet part 3, the reflecting part is connected between the light outlet part and the light inlet part, the light inlet part 1 and the reflecting part 2 form the inner side surface of the hollow cylinder, the light inlet part 1 is in a concave sawtooth shape, the reflecting part 2 is a total reflection surface, the reflecting part comprises two reflecting surfaces symmetrically arranged about the reference surface, each reflecting surface is an outer convex annular curved surface, the light outlet part 3 forms the outer side surface of the hollow cylinder, and the outer side surface is a smooth surface; the plane perpendicular to the central rotation axis of the hollow cylinder and intersecting the central rotation axis at the central point P of the hollow cylinder is taken as a reference plane, and the light incident part 1, the reflecting part 2 and the light emergent part 3 are all symmetric on two sides of the reference plane; the light inlet part 1 forms a containing cavity for containing a light source array, the light source array is composed of a plurality of identical light sources 4, the light source array is annularly arranged and arranged on the reference surface, the optical axes of all the light sources 4 are arranged on the reference surface, the optical axes of all the light sources 4 pass through the center point P, and the light rays of all the light sources 4 are emitted to a direction far away from the center point P; the light emitting part is used for compressing the light rays emitted by the light source array to a preset angle range in the axial direction of the central rotating shaft, and the light rays compressed by the inner side face are uniformly distributed in the reference plane after exiting from the outer side face.
The light incident part 1 comprises a first light incident surface 11 and a second light incident surface 12, wherein the first light incident surface 11 is used as a bottom arm of the accommodating cavity, and the second light incident surface 12 is used as a side arm of the accommodating cavity; the two side arms are respectively connected with the bottom arm and are symmetrical relative to the reference plane; the reflecting portion 2 includes two reflecting surfaces symmetrically disposed about the reference surface, and each reflecting surface is connected to an outer end of one of the second light incident surfaces 12.
The first light incident surface 11 is composed of a first fresnel refraction surface 111, a second fresnel refraction surface 112 and a third fresnel refraction surface 113; the first fresnel refraction surface 111 intersects with the reference surface, and the first fresnel refraction surface 111 is an annular plane perpendicular to the reference surface; the second fresnel refraction surface 112 is two groups of concave annular curved surfaces symmetrically arranged about the reference surface, and the two groups of annular curved surfaces are respectively connected with two ends of the first fresnel refraction surface 111; the third fresnel refraction surface 113 is two groups of concave annular sawtooth steps symmetrically arranged about the reference surface, one end of each group of annular sawtooth steps is respectively connected with the outer end of one group of annular curved surfaces, and the other end of each group of annular sawtooth steps is respectively connected with one second light incident surface 12.
As shown in fig. 2, 5 and 6, the third fresnel refractive surface 113 is two sets of concave annular saw tooth steps symmetrically disposed about the reference surface, each set of annular saw tooth steps is composed of an inner annular inclined surface and an outer annular inclined surface, one end of the inner annular inclined surface intersects with one end of the outer annular inclined surface at the tooth tip position of the saw tooth, the other end of the inner annular inclined surface intersects with the second fresnel refractive surface 112, the outer annular inclined surface intersects with the second light incident surface 12, the saw tooth angle of the annular saw tooth steps is a first angle α, the first angle is 10 ° -60 °, α in this embodiment is 30 °, the radial length of the inner annular inclined surface at the central rotation axis is a first distance d1, and the axial length of each set of annular saw tooth steps at the central rotation axis is a second distance d2.
As shown in fig. 3, the light rays within the preset angle range (within the angle range of-30 ° to 30 °) emitted by the light source 4 are converged within the ideal angle range (±3° to ±10°), by adjusting the first distance d1 range of 0.5 to 3mm, preferably 2.13mm, and the second distance d2 range of 1.5 to 3mm, preferably 2.2mm.
The second light incident surface 12 is an annular inclined surface or an annular straight surface, the annular plane is parallel to the reference surface, when the second light incident surface 12 is an annular inclined surface, as the distance in the radial direction of the central rotation axis increases, the distance between the two groups of annular inclined surfaces in the axial direction of the central rotation axis decreases, the included angle between the second light incident surface 12 and the reference surface is a second angle, and the second angle β is greater than 0 ° and less than or equal to 45 °, and in this embodiment, the second angle is 2 °; the cross section of the reflecting part 2 in the XZ plane direction is a free curve, and the curve can be composed of a plurality of straight-line segments. As shown in fig. 4, after the rest of the light rays (the light rays taking the angle range from-30 ° to 30 °) emitted by the light source 4 pass through the second light incident surface 12 and the reflecting portion 2, the light rays become reversely distributed from bottom to top, and the emitted light rays are reversely overlapped and distributed within the angle range of ±4°;
By locating the focal point of the second fresnel refractive surface 112 on the reference surface as shown in fig. 3 and 4, all the light sources are located at the focal point of the second fresnel refractive surface, so as to obtain the best condensing effect on the paraxial light emitted from the light sources; the projection of the connection part of the reflecting surface and the second light incident surface on the reference surface is overlapped with the projection of the light source array on the reference surface, so that the light rays of all the light sources within the angle range of-90 degrees to 90 degrees can be gathered, and the light energy utilization rate is improved.
And rotating the XZ plane section view of the inner sawtooth Fresnel navigation mark lamp optical lens shown in the figure 1 by 360 degrees around a central rotation axis to obtain the entity model of the integrally formed inner sawtooth Fresnel navigation mark lamp optical lens.
In order to facilitate the processing of the inner surface and the installation of the light source array and the electric control system thereof, the inner sawtooth Fresnel navigation mark lamp optical lens can be equally divided into a plurality of lens units, the single lens unit is an equally divided cylinder with a smooth outer surface, and the plurality of lens units can be assembled into an integral inner sawtooth Fresnel navigation mark lamp optical lens in a butt joint mode.
Or as shown in fig. 5, the number of the lens units is reduced as much as possible while the processing of the inner surface and the installation of the light source array and the electric control system thereof are facilitated, the XZ plane section view of the optical lens of the inner sawtooth fresnel navigation mark lamp shown in fig. 1 can be rotated 180 ° around the central rotation axis, the lens unit model can be obtained, a single lens unit is in a semi-cylindrical shape with a smooth outer surface, and two lens units can be assembled into an integral optical lens of the inner sawtooth fresnel navigation mark lamp in a butt joint manner.
A specific application example is given below in connection with the parameters. The upper half coordinate point of the curve of the cross section of the first light incident surface 11, the second light incident surface 12 and the reflecting part 2 in the XZ plane direction of the inner sawtooth Fresnel navigation mark optical lens main body is shown in fig. 6, and the upper half and the lower half are symmetrical.
The coordinate system is formed by taking the center point O of the light source 4 as an origin, the optical axis as an x-axis, and an axis parallel to the center rotation axis through the center point O of the light source 4 as a y-axis, as shown in fig. 6. Coordinates of start points and end points of straight lines of each section of curves from section a to section h on the cross section of the optical lens body of the inner sawtooth Fresnel navigation mark lamp are shown in tables 1 and 2.
A section of curve-consisting of straight line sections a0b0
B-segment curve-consisting of straight segments b0b1, b1b2,..b47 c0
C section of curve-composed of straight line section c0d0
D section of curve-composed of straight line section d0e0
E section of curve-composed of straight line section e0f0
F section of curve-composed of straight line section f0g0
G section curve-from straight section g0g1, g1g 2..g 49g50 composition
H section of curve-consisting of straight line section h0h1
Table 1: coordinates of a section to d section curves on the cross section of the lens main body
Table 2: coordinates of curves from e segment to h segment on the cross section of the lens main body
Example 2:
Embodiment 2 provides a beacon light comprising a sealing plate, an array of light sources, and an internally serrated fresnel beacon light optical lens as described in embodiment 1. The inner sawtooth Fresnel navigation mark lamp optical lens is used for distributing light beams emitted by the light source array; the sealing plate is detachably arranged on the top surface and the bottom surface of the inner sawtooth Fresnel navigation mark lamp optical lens, the sealing plate and the outer side surface of the inner sawtooth Fresnel navigation mark lamp optical lens jointly form a cylinder, and the sealing plate is provided with a light source mounting hole capable of being opened and closed.
To verify the effect of example 2, a related simulation was performed using optical software.
Specifically, referring to fig. 7 and 8, the beacon light provided in embodiment 2 includes a light source array and an intra-sawtooth fresnel beacon light optical lens as described in the embodiment, where the light source array is formed by 6 light sources 4 arranged in a ring array, in this embodiment 2, the light sources 4 are LED lamp beads, and the fresnel beacon light optical lens is used for distributing light beams emitted by the light source array; the light emitted from the light source array is entirely irradiated to the light incident portion 1, reflected by the reflecting portion 2, and emitted through the light emitting portion 3.
Referring to fig. 9, the illuminance distribution diagram of the light spot in the XZ plane direction at the receiving surface at 1500mm is simulated in optical software, and it can be seen from the simulation diagram that the light spot is well compressed in the direction and takes a rectangular spot shape.
Referring to fig. 10, the intensity distribution in the YZ plane was simulated in the optical software, and it can be seen from the simulation that the intensity uniformity was high in this direction, exceeding 90%.
The inner sawtooth Fresnel navigation mark lamp optical lens and the navigation mark lamp provided by the invention have the advantages that the applicability is strong, the application range is wide, the assembly is easy, the serrated surface is the inner side surface, the outer side surface is the smooth cylinder side surface, the beneficial effects of easy cleaning and maintenance are also realized after the inner side surface is properly sealed, the external lampshade is omitted, the volume of the navigation mark lamp is reduced, the light transmittance loss caused by the installation of the lampshade can be reduced, and the simulation shows that the inner sawtooth Fresnel navigation mark lamp optical lens and the navigation mark lamp obtain good compression effect on the XZ plane direction on the light rays emitted by the light source array, and the effect of uniform distribution on the YZ plane is excellent.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (3)
1. An interior sawtooth fresnel navigation mark lamp optical lens, its characterized in that: the inner sawtooth Fresnel navigation mark lamp optical lens is integrally a hollow cylinder with central rotation symmetry and comprises a light inlet part, a reflecting part and a light outlet part, wherein the reflecting part is connected between the light outlet part and the light inlet part, the light inlet part and the reflecting part form the inner side surface of the hollow cylinder, the light inlet part is in a concave sawtooth shape, the reflecting part is a total reflection surface, the reflecting part comprises two reflecting surfaces which are symmetrically arranged about the reference surface, each reflecting surface is an outwards convex annular curved surface, the light outlet part forms the outer side surface of the hollow cylinder, and the outer side surface is a light surface; the plane perpendicular to the central rotation axis of the hollow cylinder and intersecting the central rotation axis at the central point of the hollow cylinder is taken as a reference plane, and the light incident part, the reflecting part and the light emergent part are all bilaterally symmetrical to the reference plane; the light inlet part forms a containing cavity for containing a light source array, the light source array is composed of a plurality of identical light sources, the light source array is annularly arranged and arranged on the reference surface, the optical axes of all the light sources are arranged on the reference surface, the optical axes of all the light sources pass through the center point of the hollow cylinder, and the light rays of all the light sources are emitted to the direction far away from the center point of the hollow cylinder; the inner side surface is used for compressing the light rays emitted by the light source array to a preset angle range in the axial direction of the central rotating shaft, and the light rays compressed by the inner side surface are uniformly distributed in the reference surface after exiting from the outer side surface;
the light incident part comprises a first light incident surface and a second light incident surface, the first light incident surface is used as a bottom arm of the accommodating cavity, and the second light incident surface is used as a side arm of the accommodating cavity; the two side arms are respectively connected with the bottom arm and are symmetrical relative to the reference plane; each reflecting surface is connected with the outer end of one second light incident surface respectively;
The first light incident surface consists of a first Fresnel refraction surface, a second Fresnel refraction surface and a third Fresnel refraction surface; the first Fresnel refraction surface is intersected with the reference surface, and is an annular plane perpendicular to the reference surface; the second Fresnel refraction surface is two groups of concave annular curved surfaces which are symmetrically arranged about the reference surface, and the two groups of annular curved surfaces are respectively connected with two ends of the first Fresnel refraction surface; the third Fresnel refraction surface is two groups of concave annular sawtooth steps symmetrically arranged about the reference surface, one end of each group of annular sawtooth steps is respectively connected with the outer end of one group of annular curved surfaces, and the other end of each group of annular sawtooth steps is respectively connected with one second light incident surface;
the focal point of the second Fresnel refraction surface is positioned on the reference surface, and all the light sources are positioned at the focal point position of the second Fresnel refraction surface;
The projection of the connection part of the reflecting surface and the second light incident surface on the reference surface coincides with the projection of the light source array on the reference surface;
Each group of annular sawtooth steps consists of an inner annular inclined plane and an outer annular inclined plane, one end of the inner annular inclined plane and one end of the outer annular inclined plane are intersected at the tooth tip position of the sawtooth, the other end of the inner annular inclined plane is intersected with the second Fresnel refraction surface, the outer annular inclined plane is intersected with the second light incident surface, the sawtooth angle of each annular sawtooth step is a first angle, the first angle is 10-60 degrees, the radial length of the inner annular inclined plane at the central rotating shaft is a first distance, the axial length of each annular sawtooth step at the central rotating shaft is a second distance, the first distance range is 0.5-3mm, and the second distance range is 1.5-3mm;
The second light incident surface is an annular plane or an annular inclined plane, and the annular plane is parallel to the reference surface;
When the second light incident surface is an annular inclined surface, the distance between the two groups of annular inclined surfaces in the axial direction of the central rotating shaft is reduced along with the increase of the distance in the radial direction of the central rotating shaft, the included angle between the second light incident surface and the reference surface is a second angle, and the second angle is larger than 0 degrees and smaller than or equal to 45 degrees.
2. The internally toothed fresnel navigation light optical lens of claim 1, wherein: the inner sawtooth Fresnel navigation mark lamp optical lens is integrally formed or formed by splicing a plurality of identical equally-divided cylindrical lens units.
3. A beacon light comprising a sealing plate, an array of light sources and an internally serrated fresnel beacon light optical lens according to any one of claims 1-2, characterised in that: the inner sawtooth Fresnel navigation mark lamp optical lens is used for distributing light beams emitted by the light source array; the sealing plate is detachably arranged on the top surface and the bottom surface of the inner sawtooth Fresnel navigation mark lamp optical lens, the sealing plate and the outer side surface of the inner sawtooth Fresnel navigation mark lamp optical lens jointly form a cylinder, and the sealing plate is provided with a light source mounting hole capable of being opened and closed.
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| CN202210677955.5A CN115127083B (en) | 2022-06-15 | 2022-06-15 | Internal sawtooth Fresnel navigation mark lamp optical lens and navigation mark lamp |
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| CN202210677955.5A CN115127083B (en) | 2022-06-15 | 2022-06-15 | Internal sawtooth Fresnel navigation mark lamp optical lens and navigation mark lamp |
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| CN115127083B true CN115127083B (en) | 2024-07-26 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078494A (en) * | 2007-06-22 | 2007-11-28 | 清华大学 | Navigation mark lamp unit and its uses |
| CN203892962U (en) * | 2014-05-28 | 2014-10-22 | 上海开腾信号设备有限公司 | Medium-and-small-diameter high-luminous-intensity LED annular-irradiation signal lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3164215U (en) * | 2010-09-07 | 2010-11-18 | 一品國際科技股▲ふん▼有限公司 | Fresnel LED lens and its LED assembly (FresnelLEDLensandLEDAssemblyThereof) |
| CN206321913U (en) * | 2016-11-23 | 2017-07-11 | 深圳市明智塑胶制品有限公司 | A kind of wide-angle backlight lens |
| CN209725876U (en) * | 2018-11-13 | 2019-12-03 | 飞利浦照明控股有限公司 | LED spotlight and lens |
| CN113915550B (en) * | 2021-10-23 | 2024-09-10 | 福建吉星智能科技股份有限公司 | Navigation mark lamp optical device and working method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078494A (en) * | 2007-06-22 | 2007-11-28 | 清华大学 | Navigation mark lamp unit and its uses |
| CN203892962U (en) * | 2014-05-28 | 2014-10-22 | 上海开腾信号设备有限公司 | Medium-and-small-diameter high-luminous-intensity LED annular-irradiation signal lamp |
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