CN107741626A - 75mm focusing machine visual lens - Google Patents
75mm focusing machine visual lens Download PDFInfo
- Publication number
- CN107741626A CN107741626A CN201711058499.1A CN201711058499A CN107741626A CN 107741626 A CN107741626 A CN 107741626A CN 201711058499 A CN201711058499 A CN 201711058499A CN 107741626 A CN107741626 A CN 107741626A
- Authority
- CN
- China
- Prior art keywords
- lens
- focal length
- microscope base
- machine visual
- optical system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The present invention relates to machine visual lens technical field, more particularly to 75mm focusing machine visual lens, including mechanical system and the optical system being installed on inside mechanical system, optical system includes the first lens G1 to the 8th lens G8 successively by object space to image space, the focal length of the optical system is f, and it meets relational expression with the focal length f1 of the first lens and the focal length f2 of the second lens：2<|f1/f|<3,1.5<|f2/f|<2.5；It meets relational expression between the focal length f3 of the 3rd lens and the focal length f4 of the 4th lens：4<|f3/f|<5.5,2<|f4/f|<3.5；Balsaming lens B1 focal length is fB1, and its focal length with optical system meets relationship below for f：1.5<|fB1/f|<3.By the first lens G1, to the 8th lens G8 arrangement and between them, the range of condition of focal length realizes focal length in 75mm, when corresponding chip size is 2/3 "; its pixel value can reach 5 mega pixels; distortion is less than 0.02%; meets high-end product demand, while its clear aperature also can flexible modulation.
Description
Technical field
The present invention relates to machine visual lens technical field, and in particular to 75mm focusing machine visual lens.
Background technology
Machine vision is exactly the system for replacing human eye with machine to measure and judge.Mainly pass through sighting device (i.e. work
Industry camera and optical lens) target will be ingested it is converted into picture signal, and send signal processing system to, signal processing system
By the information such as pixel distribution in image and brightness, color, it is transformed into data signal；Then image processing software is believed these numerals
Number various computings are carried out to extract clarification of objective, and then measurement is made to being ingested target according to feature and judged.
In recent years, as the fast development of microelectronics industry, high-resolution, the NI Vision Builder for Automated Inspection of high processing rate are continuous
It is born, this proposes new requirement to matched optical lens.And for the machine vision mirror of domestic existing 75mm focal lengths
For head, when camera chip size is 2/3 ", pixel ratio is relatively low, and optical distortion is larger, can not meet high-end product demand.
It would therefore be highly desirable to which one kind is 2/3 in chip size " when, high pixel, the 75mm focusing machine visual lens of low distortion.
The content of the invention
It is an object of the invention to：In view of the shortcomings of the prior art, a kind of focal length is provided in 75mm, corresponding chip chi
Very little when being 2/3 ", its pixel value reaches 5 mega pixels, 75mm focusing machine visual lens of the distortion less than 0.02%.
To achieve the above object, the present invention adopts the following technical scheme that：
75mm focusing machine visual lens, including mechanical system and the optical system that is installed on inside the mechanical system,
The optical system is included the first lens G1 with positive light coke and biconvex structure by object space to image space, with positive light focus successively
Degree and the second lens G2 of bent moon structure, the 3rd lens G3 with negative power and bent moon structure, with negative power and double
4th lens G4 of recessed structure, the 5th lens G5 with positive light coke and biconvex structure, with positive light coke and biconvex structure
The 6th lens G6, the focal length of the optical system is f, its focal length f1 and the 6th lens G6 with the first lens G1 focal length f6
Meet relational expression：0.5<|f1/f|<0.8；0.6<|f6/f|<0.9；The 4th lens G4 combines to form glue with the 5th lens G5
The focal length for closing lens B, the balsaming lens B is fB, it meets relationship below：6<|fB/f|<9。
One kind as 75mm focusing machine visual lens of the present invention is improved, the refractive index of the second lens G2
For n2, Abbe number v2, it meets relational expression：1.55<n2<1.8；60<v2<70.
One kind as 75mm focusing machine visual lens of the present invention is improved, the refractive index of the 3rd lens G3
For n3, Abbe number v3, it meets relational expression：1.6<n3<1.85；40<v3<50.
One kind as 75mm focusing machine visual lens of the present invention is improved, the first lens G1 to described the
Six lens G6 are glass spherical lens.
One kind as 75mm focusing machine visual lens of the present invention is improved, and the mechanical system includes preceding press
Circle, preceding microscope base, AB spacer rings, switching circle, focusing ring, fixed cylinder, diaphragm, rear trim ring, rear microscope base, EF spacer rings, light modulation ring and C connect
Mouthful, the preceding trim ring is socketed on the end of the preceding microscope base, and the AB spacer rings are arranged at the first lens G1 and described second
Between lens G2, the focusing ring is connected by the switching circle with the preceding microscope base, and the fixing barrel casing is connected to the preceding mirror
The middle part of seat, the diaphragm are arranged between the preceding microscope base and the rear microscope base, and the rear trim ring is arranged at the rear microscope base
The inside of one end, and between the 4th lens G4 and the diaphragm, the EF spacer rings are arranged at the 5th lens G5
Between the 6th lens G6, for the light modulation ring set in the fixed cylinder, the C interface is socketed on the rear microscope base
The other end.
One kind as 75mm focusing machine visual lens of the present invention is improved, and the aperture of the diaphragm is circular hole,
Scope is 1.25mm~14.4mm；The aperture of the diaphragm is adjustable in the range of F2.8~F32.
The beneficial effects of the present invention are：The object distance range of the optical system of the present invention is 0.6m~infinity, works as thing
During away from changing, the first lens G1 to the 6th lens G6 whole group lens move forward and backward as focusing group.Pass through the first lens
To the 6th lens G6 arrangement and between them, the range of condition of focal length realizes focal length and is in 75mm, corresponding chip size G1
When 2/3 ", its pixel value reaches 5 mega pixels, and its distortion is less than 0.02%, meets high-end product demand, while its thang-kng
Aperture also can flexible modulation.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair
Bright exemplary embodiment and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of optical system in the present invention；
Fig. 3 is the index path of optical system in the present invention.
Fig. 4 is the MTF curve of the optical system of the present invention.
Fig. 5 is the distortion curve of the optical system of the present invention.
Embodiment
Some vocabulary has such as been used to censure specific components among specification and claim.Those skilled in the art should
It is understood that hardware manufacturer may call same component with different nouns.This specification and claims are not with name
The difference of title is used as the mode for distinguishing component, but is used as the criterion of differentiation with the difference of component functionally.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer in acceptable error range, those skilled in the art can be described within a certain error range solution
Technical problem, basically reach the technique effect.
In the description of the invention, it is to be understood that term " on ", " under ", "front", "rear", "left", "right", level "
Orientation or position relationship Deng instruction be based on orientation shown in the drawings or position relationship, be for only for ease of the description present invention and
Simplify description, rather than the device or element of instruction or hint meaning there must be specific orientation, with specific azimuth configuration
And operation, therefore be not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；It can be machine
Tool connects or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
The present invention is described in further detail below in conjunction with accompanying drawing, but it is not as a limitation of the invention.
As shown in figures 1-4,75mm focusing machine visual lens, including mechanical system and be installed on inside mechanical system
Optical system, optical system by object space to image space successively include the first lens G1 with positive light coke and biconvex structure, with
Positive light coke and the second lens G2 of bent moon structure, the 3rd lens G3 with negative power and bent moon structure, with negative light focus
Degree and the 4th lens G4 of double-concave structure, the 5th lens G5 with positive light coke and biconvex structure, with positive light coke and double
6th lens G6 of male structure, the focal length of optical system is f, its focal length f1 and the 6th lens G6 with the first lens G1 focal length
F6 meets relational expression：0.5<|f1/f|<0.8；0.6<|f6/f|<0.9；4th lens G4 combines to form gluing with the 5th lens G5
Lens B, balsaming lens B focal length are fB, it meets relationship below：6<|fB/f|<9.Can from Fig. 4 MTF curve figures
Go out, focal length is realized in 75mm by said structure, the optical system resolution ratio of the present embodiment reaches 145lp/mm, when corresponding
When camera chip size is 2/3 ", its pixel is exactly 8.8 × 6.6 × 4 × 145 × 145=4884528, and about 5,000,000.In addition,
From fig. 5, it can be seen that distortion now is less than 0.02%, meet high-end product demand, while its clear aperature also can be adjusted flexibly
Section.
Preferably, the second lens G2 refractive index be n2, Abbe number v2, it meets relational expression：1.55<n2<1.8；60<
v2<70。
Preferably, the 3rd lens G3 refractive index be n3, Abbe number v3, it meets relational expression：1.6<n3<1.85；40<
v3<50。
Preferably, the first lens G1 to the 6th lens G6 is glass spherical lens, by domestic crown board, flint, dense flint,
Lanthanum crown board, lanthanum flint, heavy-lanthanide flint glass combination form.
Preferably, mechanical system includes preceding trim ring 1, preceding microscope base 2, AB spacer rings 3, switching circle 4, focusing ring 5, fixed cylinder 6, light
Door screen 7, rear trim ring 8, rear microscope base 9, EF spacer rings 10, light modulation ring 11 and C interface 12, the end of microscope base 2, AB before preceding trim ring 1 is socketed on
Spacer ring 3 is arranged between the first lens G1 and the second lens G2, and focusing ring 5 is connected by circle 4 of transferring with preceding microscope base 2, fixed cylinder 6
The middle part of microscope base 2, diaphragm 7 are arranged between preceding microscope base 2 and rear microscope base 9 before being socketed on, and rear trim ring 8 is arranged at rear one end of microscope base 9
Inside, and between the 4th lens G4 and diaphragm 7, EF spacer rings 10 are arranged between the 5th lens G5 and the 6th lens G6,
Light modulation ring 11 is sheathed in fixed cylinder 6, and C interface 12 is socketed on the other end of rear microscope base 9.
Preferably, the aperture of diaphragm 7 is circular hole, and scope is 1.25mm~14.4mm；The aperture of diaphragm 7 is in F2.8~F32
In the range of it is adjustable.
In use, when light is after the first lens G1 to the 6th lens G6, picture can be formed in the 8th lens G6 rear
Face 20, on the basis of image planes 20, when object distance changes, the 6th lens G6 changes to the interval occurred of image planes 20, i.e. the first lens
G1 to the 6th lens G6 is moved forward and backward together, and other sizes of space do not change.When object distance infinity, the 6th lens G6 with
The distance between image planes 20 are 31.378mm；As object distance 10m, the distance between the 6th lens G6 and image planes 20 are
31.878mm；As object distance 4m, the distance between the 6th lens G6 and image planes 20 are 32.723mm；As object distance 1.2m, the 6th
The distance between lens G6 and image planes 20 are 36.092mm；As object distance 0.6m, the distance between the 6th lens G6 and image planes 20
For 41.133mm.
Some preferred embodiments of the present invention have shown and described in described above, but as previously described, it should be understood that this hair
It is bright to be not limited to form disclosed herein, the exclusion to other embodiment is not to be taken as, and available for various other
Combination, modification and environment, and can in the scope of the invention is set forth herein, by the technology of above-mentioned teaching or association area or
Knowledge is modified., then all should be and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention
In the protection domain of appended claims of the present invention.
Claims (6)
1.75mm focusing machine visual lens, it is characterised in that：Including mechanical system and it is installed on inside the mechanical system
Optical system, the optical system included successively by object space to image space the first lens G1 with positive light coke and biconvex structure,
The second lens G2 with positive light coke and bent moon structure, the 3rd lens G3 with negative power and bent moon structure, with negative
4th lens G4 of focal power and double-concave structure, the 5th lens G5 with positive light coke and biconvex structure, with positive light coke
And the 6th lens G6 of biconvex structure, the focal length of the optical system is f, its focal length f1 and the 6th lens with the first lens G1
G6 focal length f6 meets relational expression：0.5<|f1/f|<0.8；0.6<|f6/f|<0.9；The 4th lens G4 and the 5th lens G5
The focal length that combination forms balsaming lens B, the balsaming lens B is fB, it meets relationship below：6<|fB/f|<9。
2. 75mm focusing machine visual lens according to claim 1, it is characterised in that：The refraction of the second lens G2
Rate is n2, Abbe number v2, and it meets relational expression：1.55<n2<1.8；60<v2<70.
3. 75mm focusing machine visual lens according to claim 1, it is characterised in that：The refraction of the 3rd lens G3
Rate is n3, Abbe number v3, and it meets relational expression：1.6<n3<1.85；40<v3<50.
4. 75mm focusing machine visual lens according to claim 1, it is characterised in that：The first lens G1 is described in
6th lens G6 is glass spherical lens.
5. 75mm focusing machine visual lens according to claim 1, it is characterised in that：The mechanical system includes preceding press
Circle, preceding microscope base, AB spacer rings, switching circle, focusing ring, fixed cylinder, diaphragm, rear trim ring, rear microscope base, EF spacer rings, light modulation ring and C connect
Mouthful, the preceding trim ring is socketed on the end of the preceding microscope base, and the AB spacer rings are arranged at the first lens G1 and described second
Between lens G2, the focusing ring is connected by the switching circle with the preceding microscope base, and the fixing barrel casing is connected to the preceding mirror
The middle part of seat, the diaphragm are arranged between the preceding microscope base and the rear microscope base, and the rear trim ring is arranged at the rear microscope base
The inside of one end, and between the 4th lens G4 and the diaphragm, the EF spacer rings are arranged at the 5th lens G5
Between the 6th lens G6, for the light modulation ring set in the fixed cylinder, the C interface is socketed on the rear microscope base
The other end.
6. 75mm focusing machine visual lens according to claim 5, it is characterised in that：The aperture of the diaphragm is circle
Hole, scope are 1.25mm~14.4mm；The aperture of the diaphragm is adjustable in the range of F2.8~F32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711058499.1A CN107741626B (en) | 2017-11-01 | 2017-11-01 | 75mm fixed focus machine vision lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711058499.1A CN107741626B (en) | 2017-11-01 | 2017-11-01 | 75mm fixed focus machine vision lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107741626A true CN107741626A (en) | 2018-02-27 |
| CN107741626B CN107741626B (en) | 2023-10-13 |
Family
ID=61233035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711058499.1A Active CN107741626B (en) | 2017-11-01 | 2017-11-01 | 75mm fixed focus machine vision lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107741626B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681036A (en) * | 2018-06-20 | 2018-10-19 | 广东奥普特科技股份有限公司 | 35mm is big, and target surface machine vision line sweeps camera lens |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001133685A (en) * | 1999-11-02 | 2001-05-18 | Matsushita Electric Ind Co Ltd | Photographic lens, electronic still camera, and video camera |
| CN201917703U (en) * | 2010-12-13 | 2011-08-03 | 福建天健安防科技有限公司 | Million-pixel fixed-focus lens |
| CN102866489A (en) * | 2011-07-05 | 2013-01-09 | 索尼公司 | Catadioptric lens system and imaging apparatus |
| CN103048773A (en) * | 2012-12-03 | 2013-04-17 | 宁波舜宇车载光学技术有限公司 | Optical lens with back focal compensation |
| CN103345043A (en) * | 2013-06-26 | 2013-10-09 | 东莞市宇瞳光学科技有限公司 | Day and night dual-purpose focusing monitoring camera |
| CN104360460A (en) * | 2014-12-01 | 2015-02-18 | 东莞市奥普特自动化科技有限公司 | Machine vision camera lens with 8mm fixed focus |
| CN204203541U (en) * | 2014-12-01 | 2015-03-11 | 东莞市奥普特自动化科技有限公司 | 8mm focusing machine visual lens |
| US20160195716A1 (en) * | 2015-01-07 | 2016-07-07 | Hiroshi Nakanuma | Imaging optical system, camera apparatus and stereo camera apparatus |
| CN106707475A (en) * | 2016-11-18 | 2017-05-24 | 舜宇光学(中山)有限公司 | Machine vision lens |
| CN106772958A (en) * | 2016-12-27 | 2017-05-31 | 东莞市宇瞳光学科技股份有限公司 | A kind of small-sized tight shot of short focus ultra-wide angle |
| JP2017116910A (en) * | 2015-12-24 | 2017-06-29 | エーエーシー テクノロジーズ ピーティーイー リミテッドＡａｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｐｔｅ．Ｌｔｄ． | Image capturing optical system |
-
2017
- 2017-11-01 CN CN201711058499.1A patent/CN107741626B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001133685A (en) * | 1999-11-02 | 2001-05-18 | Matsushita Electric Ind Co Ltd | Photographic lens, electronic still camera, and video camera |
| CN201917703U (en) * | 2010-12-13 | 2011-08-03 | 福建天健安防科技有限公司 | Million-pixel fixed-focus lens |
| CN102866489A (en) * | 2011-07-05 | 2013-01-09 | 索尼公司 | Catadioptric lens system and imaging apparatus |
| CN103048773A (en) * | 2012-12-03 | 2013-04-17 | 宁波舜宇车载光学技术有限公司 | Optical lens with back focal compensation |
| CN103345043A (en) * | 2013-06-26 | 2013-10-09 | 东莞市宇瞳光学科技有限公司 | Day and night dual-purpose focusing monitoring camera |
| CN104360460A (en) * | 2014-12-01 | 2015-02-18 | 东莞市奥普特自动化科技有限公司 | Machine vision camera lens with 8mm fixed focus |
| CN204203541U (en) * | 2014-12-01 | 2015-03-11 | 东莞市奥普特自动化科技有限公司 | 8mm focusing machine visual lens |
| US20160195716A1 (en) * | 2015-01-07 | 2016-07-07 | Hiroshi Nakanuma | Imaging optical system, camera apparatus and stereo camera apparatus |
| JP2017116910A (en) * | 2015-12-24 | 2017-06-29 | エーエーシー テクノロジーズ ピーティーイー リミテッドＡａｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｐｔｅ．Ｌｔｄ． | Image capturing optical system |
| CN106707475A (en) * | 2016-11-18 | 2017-05-24 | 舜宇光学(中山)有限公司 | Machine vision lens |
| CN106772958A (en) * | 2016-12-27 | 2017-05-31 | 东莞市宇瞳光学科技股份有限公司 | A kind of small-sized tight shot of short focus ultra-wide angle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681036A (en) * | 2018-06-20 | 2018-10-19 | 广东奥普特科技股份有限公司 | 35mm is big, and target surface machine vision line sweeps camera lens |
| CN108681036B (en) * | 2018-06-20 | 2023-08-22 | 广东奥普特科技股份有限公司 | 35mm large target surface machine vision line scanning lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107741626B (en) | 2023-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107632376A (en) | Vision lenses | |
| CN207502802U (en) | 75mm focusing machine visual lens | |
| CN107957617B (en) | 8mm fixed focus machine vision lens | |
| CN109116517A (en) | A kind of big target surface high-res line of high magnification sweeps machine visual lens | |
| CN108594401A (en) | A kind of big target surface focusing machine visual linear array camera lens | |
| CN207457594U (en) | 4mm focusing machine visual lens | |
| CN107688225A (en) | 6mm focusing machine visual lens | |
| CN108681036A (en) | 35mm is big, and target surface machine vision line sweeps camera lens | |
| CN210348042U (en) | High-resolution lens | |
| CN106125268A (en) | A kind of liquid lens zoom lens and include its shooting instrument | |
| CN208314310U (en) | A kind of big target surface focusing machine visual linear array camera lens | |
| CN106338814A (en) | Large field of view long exit pupil distance and long working distance stellar simulator's optical system | |
| CN207571374U (en) | 8mm focusing machine visual lens | |
| CN108710195A (en) | The optical system of big target surface machine visual lens | |
| CN107688228A (en) | 4mm focusing machine visual lens | |
| CN207676025U (en) | 12mm focusing machine visual lens | |
| CN101915982B (en) | High-resolving force optical zoom lens | |
| CN107741626A (en) | 75mm focusing machine visual lens | |
| CN208314311U (en) | A kind of wide working distance of big target surface sweeps the optical system of focusing machine visual lens offline | |
| CN208953765U (en) | A kind of big target surface high-res line of high magnification sweeps machine visual lens | |
| CN208672894U (en) | The optical system of big target surface machine visual lens | |
| CN208969324U (en) | A kind of high-resolution machine visual lens | |
| CN208795917U (en) | A kind of lens assembly carrying out multi-angle of view shooting | |
| CN208795914U (en) | A kind of wide operating distance focusing machine visual lens of high-resolution | |
| CN109633874A (en) | A kind of telecentric lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |