CN109752836A - A kind of lens system detecting small-bore 360 ° of inner walls - Google Patents
A kind of lens system detecting small-bore 360 ° of inner walls Download PDFInfo
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- CN109752836A CN109752836A CN201711055218.7A CN201711055218A CN109752836A CN 109752836 A CN109752836 A CN 109752836A CN 201711055218 A CN201711055218 A CN 201711055218A CN 109752836 A CN109752836 A CN 109752836A
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- 239000011521 glass Substances 0.000 claims abstract description 78
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 238000003384 imaging method Methods 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 13
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- 238000007689 inspection Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
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Abstract
The invention discloses a kind of lens system for detecting small-bore 360 ° of inner walls, entire optical system include since object space first single negative spheric glass, second be diaphragm unit, the positive spheric glass of third list, the 4th single negative spheric glass, the 5th single positive spheric glass, the 6th single positive spheric glass and the 7th single positive spheric glass；Described 4th single negative spheric glass and the 5th single positive spheric glass group are combined into bonding eyeglass；With the rapid growth of modern industrial production, the development of industrial detection is also more and more mature, but the detection of the inner hole of some workpiece is but difficult to realize, the present invention is designed primarily directed to the problem that inner hole detection is but difficult to realize, and the present invention can detect entire 360 ° of inner walls, and the diameter for detecting the bore of inner wall can be from 8mm to 120mm, the present invention has only used 6 pieces of eyeglasses, it is not only simple in structure, it is easy to make, it is at low cost.
Description
Technical field
The present invention relates to camera technique field, the lens system of specifically a kind of small-bore 360 ° of inner walls of detection.
Background technique
With the rapid growth of modern industrial production, the development of industrial detection is also more and more mature, but some workpiece
Inner hole detection is but difficult to realize, such as vertical since ordinary optical camera lens can have certain restraining factors in NI Vision Builder for Automated Inspection
The appearances such as body product, inner hole side wall, cylinder outer wall can not all detect.And 360 ° of inner wall detector lens can effectively solve detection inner hole
The problem of side wall, therefore 360 ° of inner wall detector lens systems can improve general detection method in NI Vision Builder for Automated Inspection.
Summary of the invention
The present invention overcomes the deficiency of common lens in present NI Vision Builder for Automated Inspection, and it is an object of the present invention to provide a kind of be directed to inner hole
It detects the problem being but difficult to realize and designs, the present invention can detect entire 360 ° of inner walls, and the diameter for detecting the bore of inner wall can
With the lens system of the small-bore 360 ° of inner walls of detection from 8mm to 120mm, to solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme:
A kind of lens system detecting small-bore 360 ° of inner walls, entire optical system include first single negative spherical surface since object space
Eyeglass, second are diaphragm unit, the positive spheric glass of third list, the 4th single negative spheric glass, the 5th single positive spheric glass, the 6th list
Positive spheric glass and the 7th single positive spheric glass, the described 4th single negative spheric glass and the 5th single positive spheric glass group are combined into bonding
Eyeglass.
As a further solution of the present invention: described first single negative spheric glass is the negative lens of convex concave, opening direction
Towards image planes.
The second unit is diaphragm.
The positive spheric glass of third list is lenticular negative lens.
4th single negative spheric glass is the negative lens of convex concave, and opening direction is towards image planes.
Described 5th single positive spheric glass is lenticular negative lens.
Described 6th single positive spheric glass is lenticular positive lens.
7th single positive spheric glass is the negative lens of convex concave, and opening direction is towards image planes.
7th single negative spheric glass and the 8th single just spheric glass are combined into bonding eyeglass, and opening direction is towards object plane.
A kind of lens system detecting small-bore 360 ° of inner walls, wherein one group of optical system satisfies the following conditional expression:
F.NO=3.6 TTL=60mm,
Wherein F.NO is camera lens relative aperture, and TTL is the optics total length (length on first single eyeglass vertex to imaging surface of camera lens
Degree).
Further, a kind of lens system detecting small-bore 360 ° of inner walls, wherein one group of optical system characteristics satisfaction is following
Conditional:
The mm of f1=- 3.93 of f/f1=- 0.73,
F/f2=0.15 f2=19.38mm,
The f3 of f/f3=- 0.21=- 13.46mm,
F/f4=0.18 f4=16.33mm,
F/f5=0.13 f5=22.84mm,
F/f6=0.08 f6=35.14mm,
Wherein f is the effective focal length of camera lens, and f1 is the focal length of first single negative spherical lens, and f2 is the coke of second single positive spherical lens
Away from f3 is the focal length of the negative spherical lens of third list, and f4 is the focal length of the 4th single positive spherical lens, and f5 is the 5th single positive spherical lens
Focal length, f6 is the focal length of the 6th single positive spherical lens.
A kind of lens system detecting small-bore 360 ° of inner walls, glass material meet:
First single negative spheric glass material meets: 1.8 < Nd < 1.95,35 < Vd < 45
The positive spheric glass material of third list meets: 1.55 < Nd < 1.65,35 < Vd < 45
4th single negative spheric glass material meets: 1.85 < Nd < 1.97,17 < Vd < 25
5th single positive spheric glass material meets: 1.45 < Nd < 1.55,65 < Vd < 87
6th single positive spheric glass material meets: 1.45 < Nd < 1.55,45 < Vd < 70
7th single positive spheric glass material meets: 1.45 < Nd < 1.55,40 < Vd < 60
Compared with prior art, the beneficial effects of the present invention are: mainly for solve NI Vision Builder for Automated Inspection commonly single camera lens without
Method detects inner hole side wall and designs, and the diameter that it can detecte the bore of inner wall can be from 8mm to 120mm, and the design is in screw
The applications such as the detection of inner wall appearance, the detection of bottle cap inner wall appearance, the detection of mechanical workpieces inner wall appearance have very big market；Energy of the present invention
Entire 360 ° of inner walls are detected, the diameter for detecting the bore of inner wall can be from 8mm to 120mm；The present invention has only used 6 pieces of eyeglasses,
It is not only simple in structure, easy to make, inner hole detection field at low cost, small in size can be popularized quickly.
Detailed description of the invention
Fig. 1 is a kind of sectional view for the lens system for detecting small-bore 360 ° of inner walls in the present invention.
Fig. 2 is the optical cross section figure of optical system in the present invention.
Fig. 3 is that wherein one group of optical system, first piece of piece sends out sectional view big in the present invention.
Fig. 4 is that wherein one group of optical system, second piece of piece sends out sectional view big in the present invention.
Fig. 5 is that wherein one group of optical system third piece piece sends out sectional view big in the present invention.
Fig. 6 is that wherein the 4th piece of piece of one group of optical system sends out sectional view big in the present invention.
Fig. 7 is that wherein the 5th piece of piece of one group of optical system sends out sectional view big in the present invention.
Fig. 8 is that wherein the 6th piece of piece of one group of optical system sends out sectional view big in the present invention.
In figure: the single negative spheric glass of 1- first, 2- second are diaphragm, the positive spheric glass of 3- third list, the single negative ball of 4- the 4th
In the single positive spheric glass of face eyeglass, 5- the 5th, the single positive spheric glass of 6- the 6th, the single positive spheric glass of 7- the 7th, OBJ- are detected
Hole side wall, IMA- image planes, d1- knife, the first eyeglass of 11- core thickness, airspace, d3- diaphragm, between the first eyeglass of d2-, diaphragm
Airspace between two eyeglasses, the second eyeglass of d4- core be thick, airspace, d6- third eyeglass between d5- second, third eyeglass
The 4th eyeglass core of core, d7- is thick, the airspace between four, the 5th d8- the, the 5th eyeglass core of d9- are thick, the five, the six eyeglass of d10- it
Between airspace, the 6th eyeglass core of d11- it is thick.
Wherein R11, R12 in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, R21, R22, R31, R32, R41, R42, R51,
R52, R61, R62 are respectively the radius of curvature in first face and second face of first, second, third and fourth, five, six single spherical lens pieces.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1~2, in the embodiment of the present invention, a kind of lens system detecting small-bore 360 ° of inner walls, including from object
Side start first single negative spheric glass 1, second be diaphragm unit 2, the single negative spheric glass 4 of the positive spheric glass the 3, the 4th of third list,
5th single positive the 5, the 6th list of spheric glass just spheric glass 6 and the 7th single positive spheric glass 7, the described 4th single negative spheric glass 4
It is combined into bonding eyeglass with the 5th single positive 5 groups of spheric glass, OBJ is to be detected inner hole side wall, and IMA is imaging surface.
Fig. 2~3 are please referred to, described first single negative spheric glass 1 is the negative lens of convex concave, and R11, R12 are respectively lens
Front surface, the radius of curvature of rear surface, the abbe number Vd of first single negative spheric glass 1 is 39, and specific refractivity Nd is
1.88；Its towards object space front surface radius of curvature R 11 be 20 < R11 < 30mm, towards the radius of curvature R 12 of image space rear surface
For 2.4 < R12 < 3.5mm, core thickness d1 is 0.6 < d1 < 1mm, in the present embodiment, towards the radius of curvature of object space front surface
R11 is 25.8mm, and the radius of curvature R 12 towards image space rear surface is 3.017mm, and core thickness d1 is 0.8mm.
Fig. 2~4 are please referred to, the positive spheric glass 3 of third list is lenticular positive lens, and R21, R22 are respectively lens
Front surface, the radius of curvature of rear surface, the abbe number Vd of the positive spheric glass 3 of third list is 36, and specific refractivity Nd is
1.63；Its towards object space front surface radius of curvature R 21 be 40 < R21 < 55mm, towards the radius of curvature R 22 of image space rear surface
For -20 < R22 < -10mm, core thickness d4 is 3 < d4 < 8mm, in the present embodiment, towards the radius of curvature of object space front surface
R21 is 47.95mm, and the radius of curvature R 22 towards image space rear surface is -15.6mm, and core thickness d4 is 5mm, and third list is just
Have diaphragm 2 among spheric glass 3 and aforementioned first single negative spheric glass 1, at first single negative 1 center of spheric glass with diaphragm 2 it
Between distance d2 be 6.85mm, positive 3 center of spheric glass of third list and between diaphragm 2 distance d3 be 8.1mm.
Fig. 2~5 are please referred to, the described 4th single negative spheric glass 4 is the negative lens of convex concave, and R31, R32 are respectively lens
Front surface, the radius of curvature of rear surface, the abbe number Vd of the 4th single positive spheric glass 4 is 19, and specific refractivity Nd is
1.92;Its towards object space front surface radius of curvature R 31 be 80 < R31 < 120mm, towards the radius of curvature of image space rear surface
R32 is 8 < R32 < 12mm, and core thickness d6 is 2 < d6 < 5mm, in the present embodiment, towards the radius of curvature of object space front surface
R31 is 90.2mm, and the radius of curvature R 32 towards image space rear surface is 10.7mm, and core thickness d7 is 3.5mm, and the 4th is single negative
Distance d6 is 8mm between adjacent surface at spheric glass 4 and positive 3 center of spheric glass of aforementioned list.
Fig. 2~6 are please referred to, the described 5th single positive spheric glass 5 is lenticular positive lens, and R41, R42 are respectively lens
Front surface, the radius of curvature of rear surface, the abbe number Vd of the 5th single positive spheric glass 5 is 70, and specific refractivity Nd is
1.48, the radius of curvature R 41 towards object space front surface is 8 < R41 < 12mm, towards the radius of curvature R 42 of image space rear surface
For -30 < R42 < -20mm, core thickness d7 is 3 < d7 < 7mm, in the present embodiment, towards the radius of curvature of object space front surface
R41 is 10.7mm, and the radius of curvature R 42 towards image space rear surface is -26.2mm, and core thickness d7 is 5mm, the 5th Dan Zhengqiu
Face eyeglass 5 and aforementioned 4th single negative spheric glass 4 are bonding lens set.
Fig. 2~7 are please referred to, the described 6th single positive spheric glass 6 is lenticular positive lens, and R51, R52 are respectively lens
Front surface, the radius of curvature of rear surface, the abbe number Vd of the 6th single positive spheric glass 6 is 60, and specific refractivity Nd is
1.52;Its towards object space front surface radius of curvature R 51 be 10 < R51 < 18mm, towards the radius of curvature R 52 of image space rear surface
For -80 < R52 < -55mm, core thickness d9 is 3 < d9 < 7mm, in the present embodiment, towards the radius of curvature of object space front surface
R51 is 14.3mm, and the radius of curvature R 52 towards image space rear surface is -66.9mm, and core thickness d9 is 5mm, the 6th Dan Zhengqiu
Distance d8 is 1.8mm between adjacent surface at face eyeglass 6 and aforementioned 5th single positive 5 center of spheric glass.
Fig. 2~8 are please referred to, the described 7th single positive spheric glass 7 is lenticular positive lens, and R61, R62 are respectively lens
Front surface, the radius of curvature of rear surface, the abbe number Vd of the 7th single positive spheric glass 7 is 49, and specific refractivity Nd is
1.53, the radius of curvature R 61 towards object space front surface is 12 < R61 < 20mm, towards the radius of curvature R 62 of image space rear surface
For 80 < R62 < 150mm, core thickness d11 is 1 < d11 < 2.3mm, in the present embodiment, towards the curvature half of object space front surface
Diameter R61 be 16.3mm, towards image space rear surface radius of curvature R 62 be 121.6mm, core thickness d12 be 1.85mm, the 7th
Distance d8 is 1.34mm between adjacent surface at single positive spheric glass 7 and aforementioned 6th single positive 6 center of spheric glass.
In conclusion design focal point of the invention is, by using aforementioned first and third, four, five, six, the light of seven lens
Design is learned, the lens construction is simple, detects and designs mainly for inner hole side wall, is useful on " 1/3 " industrial camera.
The present invention is not limited to the above embodiments, on the basis of technical solution disclosed by the invention, the skill of this field
For art personnel according to disclosed technology contents, one can be made to some of which technical characteristic by not needing creative labor
A little simple modification, equivalent change and modifications, belong in the range of technical solution of the present invention.
Claims (9)
1. a kind of lens system for detecting small-bore 360 ° of inner walls, it is characterised in that: including first single negative spherical surface since object space
Eyeglass (1) second is diaphragm unit (2), the positive spheric glass of third list (3), the 4th single negative spheric glass (4), the 5th Dan Zhengqiu
Face eyeglass (5), the 6th single positive spheric glass (6) and the 7th single positive spheric glass (7), the described 4th single negative spheric glass (4) and
5th single positive spheric glass (5) group is combined into bonding eyeglass, is provided between the third piece eyeglass (3) and the 4th piece of eyeglass (4)
Diaphragm.
2. a kind of lens system for detecting small-bore 360 ° of inner walls according to claim 1, which is characterized in that described first
Single negative spheric glass (1) is the negative lens of convex concave, and opening direction is towards image planes.
3. a kind of lens system for detecting small-bore 360 ° of inner walls according to claim 1, which is characterized in that described second
Diaphragm unit (2) is located at first single negative spheric glass (1) below.
4. a kind of lens system for detecting small-bore 360 ° of inner walls according to claim 1, which is characterized in that the third
Single positive spheric glass (3) is lenticular spherical lens.
5. a kind of lens system for detecting small-bore 360 ° of inner walls according to claim 1, which is characterized in that the described 4th
Single negative spheric glass (4) is the negative lens of convex concave, and opening direction is towards image planes.
6. a kind of lens system for detecting small-bore 360 ° of inner walls according to claim 1, which is characterized in that the described 5th
Single positive spheric glass (5) is lenticular positive lens, and the described 6th single positive spheric glass (6) is lenticular positive lens.
7. a kind of lens system for detecting small-bore 360 ° of inner walls according to claim 1, which is characterized in that the described 7th
Single positive spheric glass (7) is the positive lens of convex concave, and opening direction is towards image planes.
8. a kind of lens system for detecting small-bore 360 ° of inner walls according to claim 1, which is characterized in that it is described wherein
One group of optical system characteristics is: it satisfies the following conditional expression:
F.NO=3.6
TTL=60mm,
Wherein F.NO is camera lens relative aperture, and TTL is the optics total length of camera lens, i.e., the length on first single eyeglass vertex to imaging surface
Degree.
9. a kind of lens system for detecting small-bore 360 ° of inner walls according to claim 1, which is characterized in that wherein one group
Optical system characteristics are: it satisfies the following conditional expression:
The f1 of f/f1=- 0.73=- 3.93mm,
F/f2=0.15 f2=19.38mm,
The f3 of f/f3=- 0.21=- 13.46mm,
F/f4=0.18 f4=16.33mm,
F/f5=0.13 f5=22.84mm,
F/f6=0.08 f6=35.14mm,
Wherein f is the effective focal length of camera lens, and f1 is the focal length of first single negative spherical lens, and f2 is the coke of second single positive spherical lens
Away from f3 is the focal length of the negative spherical lens of third list, and f4 is the focal length of the 4th single positive spherical lens, and f5 is the 5th single positive spherical lens
Focal length, f6 is the focal length of the 6th single positive spherical lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711055218.7A CN109752836B (en) | 2017-11-01 | 2017-11-01 | Lens system for detecting 360-degree inner wall with small caliber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711055218.7A CN109752836B (en) | 2017-11-01 | 2017-11-01 | Lens system for detecting 360-degree inner wall with small caliber |
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| Publication Number | Publication Date |
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| CN109752836A true CN109752836A (en) | 2019-05-14 |
| CN109752836B CN109752836B (en) | 2023-11-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112904533A (en) * | 2021-02-02 | 2021-06-04 | 南京波长光电科技股份有限公司 | Optical lens inside 360-degree detection hole |
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| JP2007279555A (en) * | 2006-04-11 | 2007-10-25 | Nidec Copal Corp | Fisheye lens |
| CN103907045A (en) * | 2011-11-01 | 2014-07-02 | 富士胶片株式会社 | Objective optical system, and endoscope device using same |
| CN105143946A (en) * | 2013-03-26 | 2015-12-09 | 富士胶片株式会社 | Imaging lens and imaging device |
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