CN105866929B - Machine visual lens and imaging method with big visual field large aperture - Google Patents

Machine visual lens and imaging method with big visual field large aperture Download PDF

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Publication number
CN105866929B
CN105866929B CN201610385184.7A CN201610385184A CN105866929B CN 105866929 B CN105866929 B CN 105866929B CN 201610385184 A CN201610385184 A CN 201610385184A CN 105866929 B CN105866929 B CN 105866929B
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lens
efl
optical system
focal length
length value
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CN105866929A (en
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林峰
曾振煌
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Fujian Normal University
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Fujian Normal University
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design

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

Abstract

The present invention relates to a kind of machine visual lens and imaging method with big visual field large aperture, including the optical system being arranged in lens barrel, the optical system includes preceding group of A being positive along the focal power that light incident direction is set gradually, iris diaphgram C, the rear group of B that focal power is positive, group A includes the positive meniscus lens A-1 set gradually before described, diverging meniscus lens A-2, biconcave lens A-3, lens A-4, biconvex lens A-5, group B includes the biconvex lens B-1 set gradually after described, biconcave lens B-2, biconvex lens B-3, diverging meniscus lens B-4 and the close-connected gluing unit of biconvex lens B-5, the present invention has big field angle, low distortion, object lens of large relative aperture, high-resolution, the characteristics of optics total length, meet high-end product demand.

Description

Machine visual lens and imaging method with big visual field large aperture
Technical field
The present invention relates to machine visual lens technical fields, and in particular to a kind of machine vision with big visual field large aperture Camera lens and imaging method.
Background technique
Machine vision is exactly that machine replaces human eye to measure and judge.NI Vision Builder for Automated Inspection refers to be produced by machine vision Product (i.e. image-pickup device is divided to two kinds of CCD and CMOS) will be ingested target and be converted into picture signal, send dedicated image to Processing system is transformed into digitized signal according to the information such as pixel distribution and brightness, color；Picture system to these signals into Various operations go to extract clarification of objective, and then controls the device action at scene according to the result of differentiation.In recent years, with The NI Vision Builder for Automated Inspection of the fast development of microelectronics industry, high-resolution, high processing rate is constantly born, this is to matched Optical lens is put forward new requirements.And for the machine visual lens of domestic existing big field angle large aperture, Wu Fatong When meet big visual field, large aperture, it is low distortion, high-resolution requirement, be unable to satisfy high-end product demand.It would therefore be highly desirable to a kind of Can meet simultaneously big visual field, large aperture, it is low distortion, high-resolution require machine visual lens.
Summary of the invention
The object of the present invention is to provide a kind of machine visual lens and imaging method with big visual field large aperture.
The technical scheme is that a kind of machine visual lens with big visual field large aperture, including be arranged in lens barrel Interior optical system, the optical system include preceding group of A being positive along the focal power that light incident direction is set gradually, can be changed The rear group of B that diaphragm C, focal power are positive, it is described before group A include the positive meniscus lens A-1 set gradually, it is diverging meniscus lens A-2, double Concavees lens A-3, lens A-4, biconvex lens A-5, it is described after group B include the biconvex lens B-1 set gradually, biconcave lens B-2, Biconvex lens B-3, diverging meniscus lens B-4 and the close-connected gluing unit of biconvex lens B-5.
Further, the field angle of the optical system is 62 ° -72 °.
Further, which meets 0.6 < y/EFL < 0.73, wherein y is half image height of the optical system, EFL For the focal length value of camera lens.
Further, the maximum clear aperature of the camera lens meets Fno≤2.0, and wherein Fno is the F number of optical system.
Further, the back work distance of the optical system meets BFL/EFL > 1.35 from BFL, and wherein EFL is camera lens Focal length value.
Further, the overall length TTL of the optical system meets TTL/EFL < 8.8, and wherein EFL is the focal length value of camera lens.
Further, the focal length value F of the diverging meniscus lens A-2A-2Meet -2.35 < FA-2/ EFL < -1.75, it is described negative double The focal length value F of concavees lens A-3A-3Meet -1.55 < FA-3/ EFL < -1.30, wherein EFL is the focal length value of camera lens.
Further, the combined focal length value F of diverging meniscus lens A-2 and negative biconcave lens A-312Meet -0.85 < F12/EFL < -0.65, wherein EFL is the focal length value of camera lens.
A kind of imaging method of the machine visual lens with big visual field large aperture, light beam successively passes through just curved in preceding group of A Month lens A-1, diverging meniscus lens A-2, biconcave lens A-3, lens A-4 refraction after, the field angle for organizing B afterwards relatively reduces, Subsequent light beam successively passes through biconvex lens B-1 in preceding group of B, biconcave lens B-2, biconvex lens B-3, diverging meniscus lens B-4 and double After the close-connected gluing unit of convex lens B-5, light is concentrated at work image planes and is imaged.
Compared with prior art, the invention has the following advantages: have big field angle, low distortion, object lens of large relative aperture, The characteristics of high-resolution, optics total length, meet high-end product demand.
Further details of elaboration is made to the present invention with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the index path of the embodiment of the present invention 2；
Fig. 3 is the axial chromatic aberration curve graph of embodiment 1；
Fig. 4 is the chromatic longitudiinal aberration curve graph of embodiment 1；
Fig. 5 is the field curve figure of embodiment 1；
Fig. 6 is the distortion curve of embodiment 1；
Fig. 7 is the MTF curve figure of embodiment 1；
Fig. 8 is the axial chromatic aberration curve graph of embodiment 2；
Fig. 9 is the chromatic longitudiinal aberration curve graph of embodiment 2；
Figure 10 is the field curve figure of embodiment 2；
Figure 11 is the distortion curve of embodiment 2；
Figure 12 is the MTF curve figure of embodiment 2.
In figure: organizing A, A-1- positive meniscus lens A-1, A-2- diverging meniscus lens A-2, A-3- biconcave lens A-3, A-4- before A- B, B-1- biconvex lens B-1, B-2- biconcave lens B-2, B-3- biconvex lens are organized after lens A-4, A-5- biconvex lens A-5, B- B-3, B-4- diverging meniscus lens B-4, B-5- biconvex lens B-5, C- iris diaphgram C.
Specific embodiment
As shown in figs. 1-12, a kind of machine visual lens with big visual field large aperture, including the light being arranged in lens barrel System, the optical system include preceding group of A being positive along the focal power that light incident direction is set gradually, iris diaphgram C, The rear group of B that focal power is positive, organizing A before described includes the positive meniscus lens A-1 set gradually, diverging meniscus lens A-2, biconcave lens A-3, lens A-4, biconvex lens A-5, organizing B after described includes the biconvex lens B-1 set gradually, biconcave lens B-2, lenticular Mirror B-3, diverging meniscus lens B-4 and the close-connected gluing unit of biconvex lens B-5.
In the present embodiment, the field angle of the optical system is 62 ° -72 °.
In the present embodiment, which meets 0.6 < y/EFL < 0.73, wherein and y is half image height of the optical system, EFL is the focal length value of camera lens.
In the present embodiment, the maximum clear aperature of the camera lens meets Fno≤2.0, and wherein Fno is the F number of optical system.
In the present embodiment, the back work distance of the optical system meets BFL/EFL > 1.35 from BFL, and wherein EFL is mirror The focal length value of head.
In the present embodiment, the overall length TTL of the optical system meets TTL/EFL < 8.8, and wherein EFL is the focal length of camera lens Value.
In the present embodiment, the focal length value F of the diverging meniscus lens A-2A-2Meet -2.35 < FA-2/ EFL < -1.75, it is described The focal length value F of negative biconcave lens A-3A-3Meet -1.55 < FA-3/ EFL < -1.30, wherein EFL is the focal length value of camera lens.
In the present embodiment, the combined focal length value F of diverging meniscus lens A-2 and negative biconcave lens A-312Meet -0.85 < F12/ EFL < -0.65, wherein EFL is the focal length value of camera lens.
In the present embodiment, in mentality of designing, using the structure of anti-long distance, before 4 lens combinations at negative light Preceding group of A of focal power, behind 5 lens combinations at the rear group of B with positive light coke, the effect of preceding group of A be reduce off-axis ray pair The field angle of B is organized afterwards, and the rear B that organizes is focused to light, is imaged on it at work image planes.
A kind of imaging method of the machine visual lens with big visual field large aperture, light beam successively passes through just curved in preceding group of A Month lens A-1, diverging meniscus lens A-2, biconcave lens A-3, lens A-4 refraction after, the field angle for organizing B afterwards relatively reduces, Subsequent light beam successively passes through biconvex lens B-1 in preceding group of B, biconcave lens B-2, biconvex lens B-3, diverging meniscus lens B-4 and double After the close-connected gluing unit of convex lens B-5, light is concentrated at work image planes and is imaged.
Embodiment one:
In the present embodiment, optical system data is as follows:
Optical surface Radius (mm) Thickness (mm) Refractive index Abbe number
1 41.650 3.63 1.70 56.20
2 404.854 0.31
3 25.643 4.00 1.88 40.81
4 9.290 4.15
5 -32.362 1.10 1.85 30.06
6 15.304 6.48
7 1823.039 2.46 1.69 53.35
8 -21.825 7.57
9 31.052 2.15 1.92 20.88
10 -206.986 7.83
Diaphragm Infinity 0.74
12 16.357 2.66 1.51 60.48
13 -16.391 1.10 1.76 27.55
14 10.569 1.71
15 12.625 2.67 1.69 49.23
16 -24.689 0.12
17 18.171 1.46 1.75 35.02
18 6.102 3.65 1.53 60.47
19 -81.242 12.91
Image planes Infinity
In the present embodiment, the focal length of optical system is 8.5mm.
In the present embodiment, lens A-4 is biconvex lens.
Tables of data of focusing is as follows:
In the present embodiment, the maximum clear aperature F number of camera lens is 1.8, is met: Fno≤2.0, wherein Fno is optical system The F number of system.
In the present embodiment, the field angle of optical system is 68 °.
In the present embodiment, optical system is matched with 2/3 " CCD, half image height y=5.5mm, y/EFL=0.647, is met: 0.6 < y/EFL < 0.73, wherein y is half image height of optical system, and EFL is the focal length value of camera lens.
In the present embodiment, the back work distance of optical system is 12.84~13.07mm from BFL, is met: BFL/EFL > 1.35, wherein EFL is the focal length value of the camera lens, the overall length TTL of optical system is 68mm, meets: TTL/EFL < 8.8, wherein EFL is the focal length value of the camera lens.
In the present embodiment, the focal length value F of diverging meniscus lens A-2A-2It is -18.636, meets: -2.35 < FA-2/EFL<- 1.75, the focal length value F of negative biconcave lens A-3A-3It is -12.094, meets: -1.55 < FA-3/ EFL < -1.30, diverging meniscus lens A-2 With the combined focal length value F of negative biconcave lens A-312It is -6.644, meets relationship: -0.85 < F12/ EFL < -0.65, wherein EFL be The focal length value of the camera lens.
In the present embodiment, which can make the resolution ratio of camera lens reach 10,000,000 pixels with matching with 2/3 " CCD.
Embodiment two:
In the present embodiment, optical system data is as follows:
Optical surface Radius (mm) Thickness (mm) Refractive index Abbe number
1 31.116 2.53 1.70 56.2
2 329.675 0.07
3 18.138 2.81 1.88 40.8
4 6.597 3.00
5 -22.319 0.96 1.85 30.1
6 11.430 4.57
7 Infinity 1.80 1.69 53.3
8 -15.085 5.39
9 23.858 1.66 1.92 20.9
10 -147.834 5.58
Diaphragm Infinity 0.51
12 12.011 1.93 1.51 60.5
13 -12.926 0.36
14 -11.285 0.79 1.76 27.5
15 8.001 1.14
16 9.305 1.95 1.69 49.2
17 -16.114 0.07
18 13.815 0.79 1.75 35.0
19 4.470 2.89 1.53 60.5
20 -41.272 9.38
Image planes Infinity
In the present embodiment, the focal length of optical system is 6mm.
In the present embodiment, lens A-4 is plano-convex lens.
Tables of data of focusing is as follows:
In the present embodiment, the maximum clear aperature F number of camera lens is 1.8, is met: Fno≤2.0, wherein Fno is optical system The F number of system.
In the present embodiment, the field angle of optical system is 67 °.
In the present embodiment, optical system is matched with 2/3 " CCD, half image height y=4mm, y/EFL=0.667, is met: 0.6 < y/EFL < 0.73, wherein y is half image height of optical system, and EFL is the focal length value of camera lens.
In the present embodiment, the back work distance of optical system is 9.38~9.50mm from BFL, is met: BFL/EFL > 1.35, Wherein EFL is the focal length value of the camera lens, the overall length TTL of optical system is 48.4mm, is met: TTL/EFL < 8.8, wherein EFL For the focal length value of the camera lens.
In the present embodiment, the focal length value F of diverging meniscus lens A-2A-2It is -13.261, meets: -2.35 < FA-2/EFL<- 1.75, the focal length value F of negative biconcave lens A-3A-3It is -8.777, meets: -1.55 < FA-3/ EFL < -1.30, diverging meniscus lens A-2 With the combined focal length value F of negative biconcave lens A-312It is -4.768, meets relationship: -0.85 < F12/ EFL < -0.65, wherein EFL be The focal length value of the camera lens.
In the present embodiment, which can make the resolution ratio of camera lens reach 10,000,000 pixels with matching with 2/3 " CCD.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with Modification, is all covered by the present invention.

Claims (2)

1. a kind of machine visual lens with big visual field large aperture, it is characterised in that: including the optical system being arranged in lens barrel System, the optical system includes preceding group of A, the iris diaphgram C, light focus being positive along the focal power that light incident direction is set gradually Spend rear group of B being positive, it is described before group A by the positive meniscus lens A-1, diverging meniscus lens A-2, biconcave lens A-3, thoroughly that set gradually Mirror A-4, biconvex lens A-5 are constituted, it is described after group B by the biconvex lens B-1, biconcave lens B-2, biconvex lens B- that set gradually 3, diverging meniscus lens B-4 and biconvex lens B-5 is constituted, and diverging meniscus lens B-4 and biconvex lens B-5 closely connect and compose gluing Group, lens A-4 are biconvex lens or plano-convex lens, and the field angle of the optical system is 62 ° -72 °, camera lens satisfaction 0.6 < Y/EFL < 0.73, wherein y is half image height of the optical system, and EFL is the focal length value of camera lens, the maximum light hole of the camera lens Diameter meets Fno≤2.0, and wherein Fno is the F number of optical system, the back work distance of the optical system from BFL meet BFL/EFL > 1.35, wherein EFL is the focal length value of camera lens, and the overall length TTL of the optical system meets TTL/EFL < 8.8, and wherein EFL is camera lens Focal length value, the focal length value F of the diverging meniscus lens A-2A-2Meet -2.35 < FA-2/ EFL < -1.75, the biconcave lens A-3 Focal length value FA-3Meet -1.55 < FA-3/ EFL < -1.30, wherein EFL is the focal length value of camera lens, diverging meniscus lens A-2 and concave-concave The combined focal length value F of lens A-312Meet -0.85 < F12/ EFL < -0.65, wherein EFL is the focal length value of camera lens.
2. a kind of imaging method of the machine visual lens with big visual field large aperture, using having as described in claim 1 The machine visual lens of big visual field large aperture, it is characterised in that: light beam successively passes through positive meniscus lens A-1, negative bent moon in preceding group of A Lens A-2, biconcave lens A-3, lens A-4 refraction after, the field angle for organizing B afterwards relatively reduces, and subsequent light beam successively passes through Biconvex lens B-1, biconcave lens B-2, biconvex lens B-3, diverging meniscus lens B-4 and biconvex lens B-5 are closely connected in preceding group of B Gluing unit after, light is concentrated at work image planes and is imaged.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104820277A (en) * 2014-01-30 2015-08-05 富士胶片株式会社 Imaging lens and imaging apparatus
CN205015550U (en) * 2014-09-18 2016-02-03 富士胶片株式会社 Imaging lens and imaging device
CN205679840U (en) * 2016-06-03 2016-11-09 福建师范大学 The wide-aperture machine visual lens in big visual field

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004245967A (en) * 2003-02-12 2004-09-02 Tochigi Nikon Corp Retrofocus lens
JP4917823B2 (en) * 2006-04-03 2012-04-18 日東光学株式会社 Zoom lens system and display device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104820277A (en) * 2014-01-30 2015-08-05 富士胶片株式会社 Imaging lens and imaging apparatus
CN205015550U (en) * 2014-09-18 2016-02-03 富士胶片株式会社 Imaging lens and imaging device
CN205679840U (en) * 2016-06-03 2016-11-09 福建师范大学 The wide-aperture machine visual lens in big visual field

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