CN107167899A - A kind of wide working distance machine visual lens of small-sized focal length - Google Patents
A kind of wide working distance machine visual lens of small-sized focal length Download PDFInfo
- Publication number
- CN107167899A CN107167899A CN201710527658.1A CN201710527658A CN107167899A CN 107167899 A CN107167899 A CN 107167899A CN 201710527658 A CN201710527658 A CN 201710527658A CN 107167899 A CN107167899 A CN 107167899A
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- lens
- focal length
- small
- working distance
- machine visual
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- 230000000007 visual effect Effects 0.000 title claims abstract description 25
- 230000007797 corrosion Effects 0.000 claims description 17
- 238000005260 corrosion Methods 0.000 claims description 17
- 238000009738 saturating Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000003384 imaging method Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 description 7
- 239000011521 glass Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 2
- 210000005252 bulbus oculi Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 210000001508 eye Anatomy 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 210000003644 lens cell Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
Classifications
-
- 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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
Abstract
The present invention relates to lens technology field, more particularly to a kind of wide working distance machine visual lens of small-sized focal length, include successively along object plane to image planes direction：Focusing group, diaphragm and fixed group, the focal length of the focusing group meet following relation with the focal length of whole camera lens：0.75 ≤ ∣ f (tune)/f ∣≤1.0；The present invention has the features such as profile is small, working range is wide, imaging performance is excellent.
Description
Technical field
The present invention relates to lens technology field, more particularly to a kind of wide working distance machine visual lens of small-sized focal length.
Background technology
Machine visual lens are widely used in the fields such as the manufacturing, quality testing, logistics, medical science, scientific research, with
The development of the strategy of made in China 2025, industrial automation is fast-developing, and machine visual lens are used as the " eye of automatic machinery
Eyeball " is in occupation of critical role.
Machine visual lens are for general on fixed position monitoring, the target detected in particular range, and this requires that camera lens has
Occupy little space, field range is big, it is low to distort, as matter it is high the features such as.
In terms of long-focus tight shot, because focal length is longer, so the total length and external diameter of camera lens are difficult control, from
And result in small product size is difficult do compact, in addition, the whole group focusing mode that conventional machines vision mirror is used be difficult meet compared with
Large-scale working distance requirement：When working distance is away from best operational position, edge declines substantially as matter, simultaneously as long
Zoom lens amount of movement is larger, so also needing additionally to increase pad when entering operating distance, to ensure focusing range.
In view of this, it is necessary to provide a kind of wide working distance machine visual lens of small-sized focal length to overcome drawbacks described above.
The content of the invention
The invention provides a kind of small-sized wide working distance machine visual lens of focal length, with profile is small, working range is wide, into
As the features such as excellent performance.
In order to solve the above-mentioned technical problem, the technical solution used in the present invention is：
A kind of wide working distance machine visual lens of small-sized focal length, include successively along object plane to image planes direction：Focusing group, diaphragm
And fixed group, the focal length of the focusing group and the focal length of whole camera lens meet following relation：0.75 ≤ ∣ f (tune)/f ∣≤1.0；
Wherein, the f (tune) is the focal length of the focusing group, and the f is the focal length of whole camera lens.
Preferably, the focusing group includes successively along object plane to image planes direction：First lens, the second lens and first are glued
Lens group.
Preferably, the first balsaming lens group includes successively along object plane to image planes direction：3rd lens, and with described
The 4th glued lens of three optics of lens.
Preferably, described fixed group includes successively along object plane to image planes direction：Second balsaming lens group and the 7th lens.
Preferably, the second balsaming lens group includes successively along object plane to image planes direction：5th lens, and with described
The 6th glued lens of five optics of lens.
Preferably, focal length, refractive index and the subsequent corrosion of first lens and second lens meet following relation：
Wherein, " f " represents focal length, and " n " represents refractive index, and " R " represents subsequent corrosion, and "-" number represents that direction is negative.
Preferably, focal length, refractive index and the subsequent corrosion of the 3rd lens and the 4th lens meet following relation：
Wherein, " f " represents focal length, and " n " represents refractive index, and " R " represents subsequent corrosion, and "-" number represents that direction is negative.
Preferably, focal length, refractive index and the subsequent corrosion of the 5th lens and the 6th lens meet following relation：
Wherein, " f " represents focal length, and " n " represents refractive index, and " R " represents subsequent corrosion, and "-" number represents that direction is negative.
Preferably, focal length, refractive index and the subsequent corrosion of the 7th lens meet following relation：
Wherein, " f " represents focal length, and " n " represents refractive index, and " R " represents subsequent corrosion, and "-" number represents that direction is negative.
A kind of small-sized wide working distance machine visual lens of focal length of the present invention, include successively along object plane to image planes direction：Adjust
Burnt group, diaphragm and fixed group so that the present invention has the characteristics of focusing facilitates, in addition, by the focal length of the focusing group with it is whole
The focal length of camera lens meets following relation：0.75 ≤ ∣ f (tune)/f ∣≤1.0 so that the present invention have high resolution, wide working distance,
The features such as small size, low distortion, also cause the operating distance of the present invention that 0.3m can be supported to infinity, it is adaptable to which focal length is
50mm, with the features such as profile is small, working range is wide, imaging performance is excellent.
Brief description of the drawings
Fig. 1 is a kind of structural representation of small-sized wide working distance machine visual lens of focal length of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, embodiments of the present invention are specifically illustrated, accompanying drawing is only for reference and explanation is used, are not constituted pair
The limitation of scope of patent protection of the present invention.
Refer to Fig. 1, a kind of small-sized wide working distance machine visual lens of focal length of the invention, along object plane to image planes direction according to
It is secondary including：Focusing group 1, diaphragm 2 and fixed group 3.
Specifically, the focusing group 1 includes successively along object plane to image planes direction：First lens G1, the second lens G2 and
One balsaming lens group U1, the fixed group 3 includes successively along object plane to image planes direction：Second balsaming lens group U2 and the 7th lens
G7, the first balsaming lens group U1 includes successively along object plane to image planes direction：3rd lens G3, and with the 3rd lens G3
4th lens G4 of optical veneering, the second balsaming lens group U2 includes successively along object plane to image planes direction：5th lens G5,
And the 6th lens G6 with the 5th lens G5 optical veneerings, the first lens G1, the second lens G2, the described 3rd
Lens G3, the 4th lens G4, the 5th lens G5, the 6th lens G6 and the 7th lens G7 are glass marble
Face lens, the focal length of the focusing group 1 meets following relation with the focal length of whole camera lens：0.75 ≤ ∣ f (tune)/f ∣≤1.0, its
In, the f (tune) is the focal length of the focusing group 1, and the f is the focal length of whole camera lens, f (the tune)=38.7mm.More
Body, the first lens G1 to the 7th lens G7 focal length, refractive index and subsequent corrosion meet the relation of table 1：
Table 1
In table 1, " f " is focal length, and " n " is refractive index, and " R " is radius of curvature, and "-" number represents that direction is negative；Specifically, institute
State f1 to the f7 and correspond respectively to the first lens G1 to the focal length of the 7th lens G7；The n1 to the n7 distinguishes
Corresponding to the first lens cells G1 to the 7th lens G7 refractive index；The R1, the R3, the R5, the R7, institute
State R9, the R11 and the R13 and correspond respectively to the first lens G1 to the one side of the close object space of the 7th lens G7
Radius of curvature, the R2, the R4, the R6, the R8, the R10, the R12 and the R14 correspond respectively to described
First lens G1 to the one side of the remote object space of the 7th lens G7 radius of curvature.It should be noted that the diaphragm 2
Between the first balsaming lens group U1 and the second balsaming lens group U2.
More specifically, the first lens G1 is positive power lens, the second lens G2 is positive power lens, institute
The 3rd lens G3 is stated for positive power lens, the 4th lens G4 is negative-power lenses, the 5th lens G5 is positive light
Power lenses, the 6th lens G6 is negative-power lenses, and the 7th lens G7 is positive power lens.Described 3rd is saturating
Mirror G3 and the 4th lens G4 are bonded with optical glue, and the 5th lens G5 and the 6th lens G6 are viscous with optical glue
Close.
The focal length f=49mm of the small-sized wide whole camera lens of working distance machine visual lens of focal length of the present embodiment, relatively
Aperture D/f=1:2.8, overall length TTL=54mm (working distance is 0.6m), working distance scope：0.3m- infinitys, described first is saturating
The radius of curvature in mirror G1 to the 7th lens G7 totally ten four faces, lens thickness, eyeglass spacing and lens index difference
Meet the condition of table 2：
Table 2
Wherein, " Nd " represents refractive index, and " D " represents lens thickness, and "-" represents that direction is negative.
From the above, it can be seen that a kind of small-sized wide working distance machine visual lens of focal length of the present invention, using full glass
Glass spheric glass, it is ensured that the features such as material low cost, eyeglass easy processing are ensure that while Performance of Optical System.The present invention will knot
Structure sets the mode in focusing group 1, diaphragm 2 and the fixed packet of group 3 focusing, it is ensured that image quality under 0.3m to infinity object distance
It is outstanding, and without the performance of increase pad, in addition, the optical distortion of present invention full filed at maximum absolute value is less than 0.2%,
Optical system rim ray relative illumination is more than 70%, and meeting imaging using guarantee resolving power under -40~70 DEG C of environment will
Ask.Further, the first lens G1 of the present invention to the 7th lens G7 parameter setting so that the present invention has high solution
The features such as image force, wide working distance, small size, low distortion, operating distance can support 0.3m to infinity, it is adaptable to which focal length is
50mm, is particularly suitable as machine visual lens application.
Above disclosed is only presently preferred embodiments of the present invention, it is impossible to the rights protection model of the present invention is limited with this
Enclose, therefore the equivalent variations made according to scope of the present invention patent, still belong to the scope that the present invention is covered.
Claims (9)
1. a kind of wide working distance machine visual lens of small-sized focal length, include successively along object plane to image planes direction：Focusing group, diaphragm and
Fixed group, it is characterised in that the focal length of the focusing group meets following relation with the focal length of whole camera lens：0.75 ≤ ∣ f (tune)/f
∣≤1.0；
Wherein, the f (tune) is the focal length of the focusing group, and the f is the focal length of whole camera lens.
2. the small-sized wide working distance machine visual lens of focal length as claimed in claim 1, it is characterised in that the focusing group is along thing
Face includes successively to image planes direction：First lens, the second lens and the first balsaming lens group.
3. the small-sized wide working distance machine visual lens of focal length as claimed in claim 2, it is characterised in that described first is glued saturating
Microscope group includes successively along object plane to image planes direction：3rd lens, and fourth lens glued with the 3rd optics of lens.
4. the small-sized wide working distance machine visual lens of focal length as claimed in claim 1, it is characterised in that described fixed group along thing
Face includes successively to image planes direction：Second balsaming lens group and the 7th lens.
5. the small-sized wide working distance machine visual lens of focal length as claimed in claim 4, it is characterised in that described second is glued saturating
Microscope group includes successively along object plane to image planes direction：5th lens, and sixth lens glued with the 5th optics of lens.
6. the small-sized wide working distance machine visual lens of focal length as claimed in claim 2, it is characterised in that first lens and
Focal length, refractive index and the subsequent corrosion of second lens meet following relation：
Wherein, " f " represents focal length, and " n " represents refractive index, and " R " represents subsequent corrosion, and "-" number represents that direction is negative.
7. the small-sized wide working distance machine visual lens of focal length as claimed in claim 3, it is characterised in that the 3rd lens and
Focal length, refractive index and the subsequent corrosion of 4th lens meet following relation：
Wherein, " f " represents focal length, and " n " represents refractive index, and " R " represents subsequent corrosion, and "-" number represents that direction is negative.
8. the small-sized wide working distance machine visual lens of focal length as claimed in claim 5, it is characterised in that the 5th lens and
Focal length, refractive index and the subsequent corrosion of 6th lens meet following relation：
Wherein, " f " represents focal length, and " n " represents refractive index, and " R " represents subsequent corrosion, and "-" number represents that direction is negative.
9. the small-sized wide working distance machine visual lens of focal length as claimed in claim 4, it is characterised in that the 7th lens
Focal length, refractive index and subsequent corrosion meet following relation：
Wherein, " f " represents focal length, and " n " represents refractive index, and " R " represents subsequent corrosion, and "-" number represents that direction is negative.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710527658.1A CN107167899A (en) | 2017-06-30 | 2017-06-30 | A kind of wide working distance machine visual lens of small-sized focal length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710527658.1A CN107167899A (en) | 2017-06-30 | 2017-06-30 | A kind of wide working distance machine visual lens of small-sized focal length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107167899A true CN107167899A (en) | 2017-09-15 |
Family
ID=59827767
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710527658.1A Pending CN107167899A (en) | 2017-06-30 | 2017-06-30 | A kind of wide working distance machine visual lens of small-sized focal length |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107688225A (en) * | 2017-11-01 | 2018-02-13 | 广东奥普特科技股份有限公司 | 6mm focusing machine visual lens |
| CN108919462A (en) * | 2018-07-03 | 2018-11-30 | 广东奥普特科技股份有限公司 | A kind of wide working distance of big target surface sweeps the optical system of focusing machine visual lens offline |
| CN110018554A (en) * | 2019-03-15 | 2019-07-16 | 广东奥普特科技股份有限公司 | A kind of wide-angle machine visual lens |
| CN110716291A (en) * | 2018-07-12 | 2020-01-21 | 三星电机株式会社 | Optical imaging system |
| CN114063253A (en) * | 2021-11-26 | 2022-02-18 | 福建福光股份有限公司 | Zero-chromatic-aberration optical lens and imaging method thereof |
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| CN101473439A (en) * | 2006-04-17 | 2009-07-01 | 全视Cdm光学有限公司 | Arrayed imaging systems and associated methods |
| CN101556369A (en) * | 2006-09-19 | 2009-10-14 | 奥林巴斯映像株式会社 | Zoom lens and electronic imaging apparatus using the same |
| CN207281372U (en) * | 2017-06-30 | 2018-04-27 | 东莞市宇瞳光学科技股份有限公司 | A kind of wide working distance machine visual lens of small-sized focal length |
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2017
- 2017-06-30 CN CN201710527658.1A patent/CN107167899A/en active Pending
Patent Citations (4)
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| JP2002139667A (en) * | 2000-11-02 | 2002-05-17 | Mamiya Op Co Ltd | Semitelephoto lens |
| CN101473439A (en) * | 2006-04-17 | 2009-07-01 | 全视Cdm光学有限公司 | Arrayed imaging systems and associated methods |
| CN101556369A (en) * | 2006-09-19 | 2009-10-14 | 奥林巴斯映像株式会社 | Zoom lens and electronic imaging apparatus using the same |
| CN207281372U (en) * | 2017-06-30 | 2018-04-27 | 东莞市宇瞳光学科技股份有限公司 | A kind of wide working distance machine visual lens of small-sized focal length |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107688225A (en) * | 2017-11-01 | 2018-02-13 | 广东奥普特科技股份有限公司 | 6mm focusing machine visual lens |
| CN107688225B (en) * | 2017-11-01 | 2023-10-10 | 广东奥普特科技股份有限公司 | 6mm fixed focus machine vision lens |
| CN108919462A (en) * | 2018-07-03 | 2018-11-30 | 广东奥普特科技股份有限公司 | A kind of wide working distance of big target surface sweeps the optical system of focusing machine visual lens offline |
| CN110716291A (en) * | 2018-07-12 | 2020-01-21 | 三星电机株式会社 | Optical imaging system |
| US11269160B2 (en) | 2018-07-12 | 2022-03-08 | Samsung Electro-Mechanics Co., Ltd. | Optical imaging system including seven lenses of +--- +-+ or +--++-+ refractive powers |
| US11927828B2 (en) | 2018-07-12 | 2024-03-12 | Samsung Electro-Mechanics Co., Ltd. | Optical imaging system including seven lenses of +−−−+−+or +−−++−+refractive powers |
| CN110018554A (en) * | 2019-03-15 | 2019-07-16 | 广东奥普特科技股份有限公司 | A kind of wide-angle machine visual lens |
| CN110018554B (en) * | 2019-03-15 | 2024-03-26 | 广东奥普特科技股份有限公司 | Wide-angle machine vision lens |
| CN114063253A (en) * | 2021-11-26 | 2022-02-18 | 福建福光股份有限公司 | Zero-chromatic-aberration optical lens and imaging method thereof |
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| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Pinguang Inventor after: Mi Shilong Inventor after: Liu Guanlu Inventor after: He Jianwei Inventor after: Mao Caiying Inventor before: Mi Shilong |
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| CB03 | Change of inventor or designer information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170915 |
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| RJ01 | Rejection of invention patent application after publication |