CN110221415A - Big visual field double telecentric optical system - Google Patents
Big visual field double telecentric optical system Download PDFInfo
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- CN110221415A CN110221415A CN201910611141.XA CN201910611141A CN110221415A CN 110221415 A CN110221415 A CN 110221415A CN 201910611141 A CN201910611141 A CN 201910611141A CN 110221415 A CN110221415 A CN 110221415A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 76
- 230000000007 visual effect Effects 0.000 title claims abstract description 23
- 230000004075 alteration Effects 0.000 claims abstract description 7
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 30
- 239000005331 crown glasses (windows) Substances 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 239000005308 flint glass Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 4
- 208000029152 Small face Diseases 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 2
- 230000005499 meniscus Effects 0.000 claims description 2
- 238000006467 substitution reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012913 prioritisation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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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
- G02B13/22—Telecentric objectives or lens systems
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Abstract
The invention discloses a kind of big visual field double telecentric optical systems, including the first optical module, aperture diaphragm and the second optical module set gradually by object space to image space along optical axis, the combination focal power of first optical module is positive, the combination focal power of second optical module is positive, the focal plane of first optical module and the second optical module is overlapped, and focal plane is overlapped with the plane where aperture diaphragm；First optical module includes the lens II and lens III of lens I and gluing, the focal power of lens I is positive and partially undertakes the combination focal power of the first optical module, the focal power combined with lens III of lens II is positive, part undertakes the combination focal power of the first optical module, makes the chief ray exact convergence of different visual field different wave lengths in the plane where aperture diaphragm.The present invention is corrected in a certain range by the spherical aberration and color difference of the chief ray generation of different visual field different wave lengths, obtains higher telecentricity, and different wavelengths of light telecentricity difference it is little the advantages that.
Description
Technical field
The present invention relates to optical instrument, specially a kind of big visual field double telecentric optical system.
Background technique
In machine vision and industrial automation system, optics detect automatically it is particularly critical, and optical lens be realize light
Learn the core component detected automatically.
Doubly telecentric camera lens, with its excellent image quality, minimum distortion, minimum parallax obtains more and more extensive answer
With.
On the one hand, doubly telecentric lens optical structure is more complex, especially wide-field doubly telecentric camera lens, multi-disc heavy caliber mirror
Piece uses so that camera lens cost is high, and extremely heavy, therefore in doubly telecentric system, the use of control heavy caliber eyeglass is to close
Key；On the other hand, in order to pursue cost control and simple process, very few uses heavy caliber eyeglass, then can be due to spherical aberration and color
Influences of difference causes telecentricity poor or telecentricity occurs to be unfavorable for the unfavorable of realization high-acruracy survey with wavelength change is violent etc.
It influences.
Summary of the invention
In view of the deficiencies of the prior art, the invention proposes a kind of big visual field double telecentric optical systems.
It is able to solve the big visual field double telecentric optical system of above-mentioned technical problem, technical solution includes by object space to image space
The first optical module, aperture diaphragm and the second optical module set gradually along optical axis, the group light combination of first optical module
Focal power is positive, and the combination focal power of second optical module is positive, the coke of first optical module and the second optical module
Plane is overlapped, and the focal plane is overlapped with the plane where aperture diaphragm.
In a kind of prioritization scheme, first optical module includes the lens I set gradually by object space to image space and gluing
The lens II and lens III being integrated, the focal power of the lens I are positive, and the lens II focal power combined with lens III is
Just, the combination focal power of two positive the first optical modules of focal power shared, lens II and lens III are used for spherical aberration corrector
And color difference, make the chief ray exact convergence of different visual field different wave lengths in the plane where aperture diaphragm.
Further, the lens I are the plano-convex lens or biconvex lens made of crown glass material, lens curvature half
Diameter it is small face object space, its refractive index and Abbe number meet 1.6≤n if lens I are plano-convex lensd≤ 1.7 and 50≤νd≤
60, its refractive index and Abbe number meet 1.4≤n if lens I are biconvex lensd≤ 1.5 and 60≤νd≤80；The lens II
For using the plano-convex lens or biconvex lens of the production of crown glass material, the focal power of lens II is positive, small curvature edge grain
Towards object space, refractive index and Abbe number meet 1.5≤nd≤ 1.6 and 55≤νd≤65；The lens III are using flint glass material
Expect the plano-concave lens or biconcave lens of production, the focal power of lens III is negative, small curvature edge grain towards image space, refractive index and
Abbe number meets 1.8≤nd≤ 1.9 and 35≤νd≤45。
To guarantee preferable spherical aberration and chromatic aberration correction ability, height of incidence of maximum field of view's chief ray on lens I is h1,
After lens I with the angle theta of optical axis1, the height of incidence on the balsaming lens that lens II and lens III form is h2, pass through
Angle theta after the balsaming lens that lens II and lens III form with optical axis2, meet simultaneously:8.5°≤θ1≤
9.0°、17.0°≤θ2≤17.5°。
Second optical module is different according to different image planes sizes:
1, image planes size IF meet 11 < IF≤43.5 when, second optical module include by object space to image space successively
Lens IV, lens V, lens VI, lens VII and the lens VIII of setting, the lens IV and V group of lens are combined into focal power and are positive
Balsaming lens, be mainly used for the correction system curvature of field, the focal power of the lens VI is negative, and the lens VII and lens VIII are ginseng
The consistent two pieces of positive lens of number.
Further, the lens IV are the concave-concave thick lens made of flint glass material, thickness t meet 10≤t≤
15, the small curvature edge grain of lens IV meets 1.6≤n towards object space, refractive index and Abbe numberd≤ 1.7 and 30≤νd≤40；Institute
Stating lens V is the biconvex lens made of crown glass material, the small curvature edge grains of lens V towards image side, refractive index and
Abbe number meets 1.7≤nd≤ 1.8 and 50≤νd≤60；The lens VI are thick thoroughly for the falcate made of flint glass material
Mirror, the concave surfaces of lens VI towards object space and convex surface towards image space, refractive index and Abbe number meets 1.6≤nd≤ 1.85 and 20≤νd≤
35；The lens VII and lens VIII be using crown glass material make concave-convex lens or plano-convex lens, lens VII and thoroughly
The small curvature edge grain relative proximity of mirror VIII, refractive index and Abbe number meet 1.7≤nd≤ 1.8 and 50≤νd≤60。
2, when image planes IF size meets IF=11, second optical module includes being set gradually by object space to image space
Lens IV, lens V, lens VII and lens VIII, described IV and lens V be combined into the balsaming lens that focal power is positive, mainly
For correcting the system curvature of field；The lens VII and lens VIII are the consistent two pieces of positive lens of parameter.
Further, the lens IV are the biconcave lens made of flint glass material, the small radius of curvature of biconcave lens
Object space is faced, refractive index and Abbe number meet 1.6≤nd≤ 1.7 and 25≤νd≤35；The lens V are using crown glass
The biconvex lens of material production, refractive index and Abbe number meet 1.55≤nd≤ 1.65 and 55≤νd≤65；VII He of lens
Lens VIII are the concave-convex lens or plano-convex lens made of crown glass material, the small radius of curvature of lens VII and lens VIII
Face relative proximity, refractive index and Abbe number meet 1.7≤nd≤ 1.8 and 50≤νd≤60。
Beneficial effects of the present invention:
1, the big visual field double telecentric optical system structure of the present invention is simple, has taken into account Performance of Optical System and manufacturing process is feasible
Property.
2, in the present invention, lens II and lens III form balsaming lens, are corrected in a certain range by different visual fields not
The spherical aberration and color difference that the chief ray of co-wavelength generates, to obtain higher telecentricity, and the telecentricity difference of different wavelengths of light
Less.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of the present invention.
Fig. 2 is the structural schematic diagram of another embodiment of the present invention.
Figure number mark: 1, the first optical module；1-1, lens I；1-2, lens II；1-3, lens III；2, the second optics group
Part；2-1, lens IV；2-2, lens V；2-3, lens VII；2-4, lens VIII；2-5, lens VI；3, aperture diaphragm.
Specific embodiment
Illustrated embodiment is described further technical solution of the present invention with reference to the accompanying drawing.
The big visual field double telecentric optical system of the present invention, including set gradually by object space (left side) to image space (right side) along optical axis
One optical module 1, aperture diaphragm 3 and the second optical module 2, the combination focal power of first optical module 1 are positive, and described
The combination focal power of two optical modules 2 is also to be positive, and the focal plane of the first optical module 1 and the second optical module 2 is overlapped, described
Focal plane is overlapped with the plane where aperture diaphragm 3, as shown in Figure 1.
First optical module 1 include left I 1-1 of lens set and it is right set and II 1-2 of lens glued together with it is saturating
Mirror III 1-3, I 1-1 of lens are the plano-convex lens made of crown glass material, radius of curvature it is small face object space
(left side), refractive index and Abbe number meet 1.6≤nd≤ 1.7 and 50≤νd≤ 60, II 1-2 of lens are using crown glass
The plano-convex lens of material production, the focal power of II 1-2 of lens is positive, small curvature edge grain towards object space (left side), refractive index with
Abbe number meets 1.5≤nd≤ 1.6 and 55≤νd≤ 65, III 1-3 of lens are saturating for the plano-concave made of flint glass material
The focal power of mirror, III 1-3 of lens is negative, and small curvature edge grain meets 1.8≤n towards image space (right side), refractive index and Abbe numberd
≤ 1.9 and 35≤νd≤45；Height of incidence of maximum field of view's chief ray on I 1-1 of lens is h1(such as 62.5mm), by lens I
It with the angle of optical axis is θ after 1-11(such as 8.88 °), the incidence on the balsaming lens of II 1-2 of lens and III 1-3 of lens composition are high
Degree is h2(such as 33mm), the angle theta after the balsaming lens of II 1-2 of lens and III 1-3 of lens composition with optical axis2(such as
17.21 °), while meeting following relationship:8.5°≤θ1≤9.0°、17.0°≤θ2≤ 17.5 °, as shown in Figure 1.
Second optical module 2 takes different technical solutions according to different image planes sizes:
1, if image planes size IF meets 11 < IF≤43.5, second optical module 2 includes by object space (left side) to picture
IV 2-1 of lens, V 2-2 of lens, VIII 2-4 of VI 2-5 of lens, VII 2-3 of lens and lens that side (right side) is set gradually, the lens IV
2-1 and V 2-2 group of lens are combined into the balsaming lens that focal power is positive, and are mainly used for the correction system curvature of field, VI 2-5's of lens
Focal power is negative, and VII 2-3 of lens and VIII 2-4 of lens are the consistent two pieces of positive lens of parameter, VIII 2- of VII 2-3 of lens and lens
4 be the plano-convex lens or concave-convex lens made of crown glass material, the small curvature half of VIII 2-4 of VII 2-3 of lens and lens
Diametric plane relative proximity, refractive index and Abbe number meet 1.7≤nd≤ 1.8 and 50≤νd≤ 60, as shown in Figure 1.
IV 2-1 of lens is the concave-concave thick lens made of flint glass material, and thickness t meets 10≤t≤15, thoroughly
The small curvature edge grain of IV 2-1 of mirror meets 1.6≤n towards object space (left side), refractive index and Abbe numberd≤ 1.7 and 30≤νd≤40；
V 2-2 of lens is the biconvex lens made of crown glass material, and the small curvature edge grain of V 2-2 of lens is towards image space
(right side), refractive index and Abbe number meet 1.7≤nd≤ 1.8 and 50≤νd≤60；VI 2-5 of lens is with flint glass material
Expect the thick meniscus lens of production, the concave surface of VI 2-5 of lens towards object space (left side) and convex surface towards image space (right side), refractive index and Abbe
Number meets 1.6≤nd≤ 1.85 and 20≤νd≤ 35, as shown in Figure 1.
In IF=23 (object space visual field 125mm), first optical module 1, aperture diaphragm 3, the second optical module 2
An example design parameter see the table below:
In above-mentioned technical proposal, under different optical system population parameters, to obtain better image quality, I 1-1 of lens
Refractive index and 1.4≤n that Abbe number meets can be usedd≤ 1.5 and 60≤νd≤ 80 biconvex lens substitute plano-convex lens；It is described
Biconvex lens substitution plano-convex lens can be used in II 1-2 of lens；Biconcave lens substitution plano-concave lens can be used in III 1-3 of lens.
2, if image planes size IF meets IF=11, the second optical module 2 (the difference is that having lacked VI 2-5 of lens) packet
IV 2-1 of lens set gradually by object space (left side) to image space (right side), V 2-2 of lens, VII 2-3 of lens and lens VIII 2-4 are included, it is described
IV 2-1 and V 2-2 of lens are combined into the balsaming lens that focal power is positive, and are mainly used for the correction system curvature of field；The lens VII
2-3 and VIII 2-4 of lens is the consistent two pieces of positive lens of parameter, and VII 2-3 of lens and VIII 2-4 of lens are using crown glass material
The plano-convex lens or concave-convex lens of production, the small curvature edge grain relative proximity of VIII 2-4 of VII 2-3 of lens and lens, refractive index
Meet 1.7≤n with Abbe numberd≤ 1.8 and 50≤νd≤ 60, as shown in Figure 2.
IV 2-1 of lens is the biconcave lens made of flint glass material, the small curvature edge grain court of biconcave lens
Object space (left side), refractive index and Abbe number meet 1.6≤nd≤ 1.7 and 25≤νd≤35；V 2-2 of lens is using crown board
The biconvex lens of glass material production, refractive index and Abbe number meet 1.55≤nd≤ 1.65 and 55≤νd≤ 65, such as Fig. 2 institute
Show.
In IF=11 (object space visual field 180mm), first optical module 1, aperture diaphragm 3, the second optical module 2
An example design parameter see the table below:
In above-mentioned technical proposal, under different optical system population parameters, to obtain better image quality, I 1-1 of lens
Refractive index and 1.4≤n that Abbe number meets can be usedd≤ 1.5 and 60≤νd≤ 80 biconvex lens substitute plano-convex lens；It is described
Biconvex lens substitution plano-convex lens can be used in II 1-2 of lens；Biconcave lens substitution plano-concave lens can be used in III 1-3 of lens.
Above-described embodiment only expresses two kinds of more specific and detailed implementations of the invention, but can not be interpreted as to hair
The limitation of bright protection scope.It must be noted that for a person skilled in the art, in the premise without prejudice to thinking of the present invention
Under, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Claims (8)
1. big visual field double telecentric optical system, it is characterised in that: including the first light set gradually by object space to image space along optical axis
It learns component (1), aperture diaphragm (3) and the second optical module (2), the combination focal power of first optical module (1) to be positive, institute
The combination focal power for stating the second optical module (2) is positive, and the coke of first optical module (1) and the second optical module (2) is flat
Face is overlapped, and the focal plane is overlapped with the plane where aperture diaphragm (3).
2. big visual field double telecentric optical system according to claim 1, it is characterised in that: first optical module (1)
Lens II (1-2) and lens III (1-3) including the lens I (1-1) and gluing that are set gradually by object space to image space, the lens
The focal power of I (1-1) is positive, and the focal power that the lens II (1-2) are combined with lens III (1-3) is positive, two positive light focuss
Spend the combination focal power of the first optical module of shared (1), lens II (1-2) and lens III (1-3) for spherical aberration corrector and
Color difference makes the chief ray exact convergence of different visual field different wave lengths in the plane where aperture diaphragm (3).
3. big visual field double telecentric optical system according to claim 2, it is characterised in that: the lens I (1-1) are to use
Crown glass material production plano-convex lens or biconvex lens, lens radius of curvature it is small face object space, if lens I (1-1) are
Then its refractive index and Abbe number meet 1.6≤n to plano-convex lensd≤ 1.7 and 50≤νd≤ 60, if lens I (1-1) are biconvex lens
Then its refractive index and Abbe number meet 1.4≤nd≤ 1.5 and 60≤νd≤80；The lens II (1-2) are using crown glass material
Expect the plano-convex lens or biconvex lens of production, the focal power of lens II (1-2) is positive, and small curvature edge grain is rolled over towards object space
It penetrates rate and Abbe number meets 1.5≤nd≤ 1.6 and 55≤νd≤65；The lens III (1-3) are to be made of flint glass material
Plano-concave lens or biconcave lens, the focal power of lens III (1-3) is negative, small curvature edge grain towards image space, refractive index and
Abbe number meets 1.8≤nd≤ 1.9 and 35≤νd≤45。
4. big visual field double telecentric optical system according to claim 2, it is characterised in that: maximum field of view's chief ray is in lens
Height of incidence on I (1-1) is h1, with the angle of optical axis it is θ after lens I (1-1)1, in lens II (1-2) and lens III
Height of incidence on the balsaming lens of (1-3) composition is h2, by the glued saturating of lens II (1-2) and lens III (1-3) composition
After mirror with the angle theta of optical axis2, meet simultaneously8.5°≤θ1≤9.0°、17.0°≤θ2≤17.5°。
5. big visual field double telecentric optical system described according to claim 1~any one of 4, it is characterised in that: in image planes
When size IF meets 11 < IF≤43.5, second optical module (2) includes the lens IV set gradually by object space to image space
(2-1), lens V (2-2), lens VI (2-5), lens VII (2-3) and lens VIII (2-4), the lens IV (2-1) and lens
V (2-2) group is combined into the balsaming lens that focal power is positive, and for correcting the system curvature of field, the focal power of the lens VI (2-5) is
Negative, the lens VII (2-3) and lens VIII (2-4) are the consistent two pieces of positive lens of parameter.
6. big visual field double telecentric optical system according to claim 5, it is characterised in that: the lens IV (2-1) are to use
The concave-concave thick lens of flint glass material production, thickness t are 10≤t≤15, and the small curvature edge grains of lens IV (2-1) is towards object
Side, refractive index and Abbe number meet 1.6≤nd≤ 1.7 and 30≤νd≤40；The lens V (2-2) are with crown glass material
Expect that the biconvex lens of production, the small curvature edge grain of lens V (2-2) meet 1.7≤n towards image space, refractive index and Abbe numberd
≤ 1.8 and 50≤νd≤60；The lens VI (2-5) are the thick meniscus lens made of flint glass material, VI (2- of lens
5) concave surface towards object space and convex surface towards image space, refractive index and Abbe number meets 1.6≤nd≤ 1.85 and 20≤νd≤35；It is described
Lens VII (2-3) and lens VIII (2-4) are the concave-convex lens or plano-convex lens made of crown glass material, lens VII
The small curvature edge grain relative proximity of (2-3) and lens VIII (2-4), refractive index and Abbe number meet 1.7≤nd≤ 1.8 and 50
≤νd≤60。
7. big visual field double telecentric optical system described according to claim 1~any one of 4, it is characterised in that: in image planes
When IF size meets IF=11, second optical module (2) include the lens IV (2-1) set gradually by object space to image space,
Lens V (2-2), lens VII (2-3) and lens VIII (2-4), the lens IV (2-1) and lens V (2-2) are combined into light focus
The balsaming lens being positive is spent, for correcting the system curvature of field；The lens VII (2-3) and lens VIII (2-4) are parameter consistent two
Piece positive lens.
8. big visual field double telecentric optical system according to claim 7, it is characterised in that: the lens IV (2-1) are to use
The small curvature edge grain of the biconcave lens of flint glass material production, biconcave lens meets towards object space, refractive index and Abbe number
1.6≤nd≤ 1.7 and 25≤νd≤35；The lens V (2-2) are the biconvex lens made of crown glass material, folding
It penetrates rate and Abbe number meets 1.55≤nd≤ 1.65 and 55≤νd≤65；The lens VII (2-3) and lens VIII (2-4) are to adopt
The plano-convex lens or concave-convex lens made of crown glass material, the small curvature edge grain of lens VII (2-3) and lens VIII (2-4)
Relative proximity, refractive index and Abbe number meet 1.7≤nd≤ 1.8 and 50≤νd≤60。
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| CN201910611141.XA CN110221415B (en) | 2019-07-08 | 2019-07-08 | Large-field double telecentric optical system |
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| CN104777720A (en) * | 2015-04-24 | 2015-07-15 | 上海市计量测试技术研究院 | Projection optical system |
| CN106291890A (en) * | 2015-05-14 | 2017-01-04 | 桂林电子科技大学 | A kind of-0.1 × doubly telecentric machine vision object lens |
| CN107615128A (en) * | 2015-03-18 | 2018-01-19 | 奥普图工程股份有限公司 | Telecentric lens |
| CN109239892A (en) * | 2018-11-21 | 2019-01-18 | 福建福光股份有限公司 | A kind of inspection of fixed multiplying power optics is as system and its imaging method |
| CN208795920U (en) * | 2018-10-18 | 2019-04-26 | 光虎光电科技(天津)有限公司 | A kind of low distortion doubly telecentric camera lens |
| CN209879123U (en) * | 2019-07-08 | 2019-12-31 | 桂林弗克斯光电仪器有限公司 | Large-field double telecentric optical system |
-
2019
- 2019-07-08 CN CN201910611141.XA patent/CN110221415B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107615128A (en) * | 2015-03-18 | 2018-01-19 | 奥普图工程股份有限公司 | Telecentric lens |
| CN104777720A (en) * | 2015-04-24 | 2015-07-15 | 上海市计量测试技术研究院 | Projection optical system |
| CN106291890A (en) * | 2015-05-14 | 2017-01-04 | 桂林电子科技大学 | A kind of-0.1 × doubly telecentric machine vision object lens |
| CN208795920U (en) * | 2018-10-18 | 2019-04-26 | 光虎光电科技(天津)有限公司 | A kind of low distortion doubly telecentric camera lens |
| CN109239892A (en) * | 2018-11-21 | 2019-01-18 | 福建福光股份有限公司 | A kind of inspection of fixed multiplying power optics is as system and its imaging method |
| CN209879123U (en) * | 2019-07-08 | 2019-12-31 | 桂林弗克斯光电仪器有限公司 | Large-field double telecentric optical system |
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