CN202217098U - High-definition focusing machine visual lens - Google Patents
High-definition focusing machine visual lens Download PDFInfo
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- CN202217098U CN202217098U CN2011202806480U CN201120280648U CN202217098U CN 202217098 U CN202217098 U CN 202217098U CN 2011202806480 U CN2011202806480 U CN 2011202806480U CN 201120280648 U CN201120280648 U CN 201120280648U CN 202217098 U CN202217098 U CN 202217098U
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Abstract
The utility model relates to a high-definition focusing machine visual lens, which comprises a focusing group and a fixing group of an optical system lens group and is characterized in that the optical system lens group is formed by the focusing group provided with positive focal power and the fixing group provided with the positive focal power. The focusing group and the fixing group are arranged along an optical axis according to the order from an object space side to an image plane side. The combined focal length of the focusing group is f1, the focal length of the fixing group is f2, wherein the absolute value of the ratio of f1 to f2 is more than 0.1 and less than 0.35. The high-definition focusing machine visual lens adopts the group focusing structure after fixation, has the advantages of maintaining high resolution and small distortion within the range of a full working distance, simplifies a focusing mechanism and is suitable for a machine visual system at a 5 million pixel level.
Description
Technical field:
The utility model belongs to the optical instrument technical field, and a kind of high definition suitable and the little distortion of high resolving power that NI Vision Builder for Automated Inspection is supporting focuses the machine vision camera lens.
Background technology:
Machine vision replaces human eye to do measurement and judgement with machine exactly.NI Vision Builder for Automated Inspection is meant that through machine vision product (be image-pickup device; Divide CMOS and two kinds of CCD) will be become picture signal by the picked-up Target Transformation; Send special-purpose image processing system to,, be transformed into digitized signal according to information such as pixel distribution and brightness, colors; Picture system carries out the characteristic that various computings come extracting objects to these signals, and then controls on-the-spot device motion according to discrimination result.
In recent years, along with the fast development of microelectronics industry, high resolving power, the NI Vision Builder for Automated Inspection of high processing rate constantly is born, and this has proposed new requirement to supporting with it optical lens.The machine vision camera lens of the whole focusing structure of common employing can only be to be directed against particular job apart from design, and picture element obviously descended when this design was applied to the close-shot end and dolly-out,s dolly-back end.And the camera lens that adopts the focusing structure that floats need adopt the complicated focus adjusting mechanism that floats, and the cost of machining is very high.How to overcome the prior art deficiency, provide a kind of and be easy to process, the machine camera lens of the low distortion of high resolving power, promptly become the object of the utility model research.
Summary of the invention:
The purpose of the utility model is to be operated in the serious phenomenon of far and near two maximal works last picture element deterioration of distance to the common machines vision lens, provides a kind of high definition of fixedly post coordination focusing structure to focus the machine vision camera lens.
The utility model technical scheme is achieved in that a kind of high definition focuses the machine vision camera lens; Comprise focusing group and fixation group in the optical system lens group; It is characterized in that: said optical system lens group is made up of the focusing group with positive light coke and the fixation group of positive light coke; Said focusing group, fixation group along optical axis from the series arrangement of object space side direction as planar side; The combined focal length of said focusing group is f1, and the focal length of fixation group is f2, should satisfy following inequality: 0.1＜| f1/f2|＜0.35.
Said focusing group is made up of positive lens L1, positive lens L2, negative lens L3, light hurdle S1, negative lens L4, positive lens L5, positive lens L6 from object space side direction image planes direction successively; Wherein negative lens L4, positive lens L5 form a cemented doublet group, and the total focal length of focusing group U1 is for just; Said fixation group U2 is made up of positive lens L7.
Negative lens L4 in the said cemented doublet group, positive lens L5 are made up of flint glass and heavy-lanthanide flint glass respectively.
Each lens in said focusing group, the fixation group are spherical lens.
The utility model adopts fixing back group focusing structure, has in full work in scope, to keep high resolving power, and the characteristics of little distortion, and simplified focus adjusting mechanism, be suitable for the NI Vision Builder for Automated Inspection of 5,000,000 Pixel-level.It has following advantage:
1, the fixedly post coordination of this system focusing mode can indemnity in change procedure because the object space aperture angle changes the variation of spherical aberration, coma, astigmatism and the curvature of field brought; Keep whole work high resolving power in the scope; For whole group focusing structure, the consistance of its picture element is more outstanding;
2, system adopts fixing back group focusing mode to simplify the design of similar unsteady back group focusing collocation structure; On the basis of complicacy that reduces Design of Mechanical Structure greatly and cost, reach the designing requirement of high picture element, and improved the tolerance of optical system processing and assembling;
3, all adopt conventional glass spherical lens in the system, help guaranteeing the simplicity of processing technology and assembling, improved the yield rate of product, reduced cost, be more suitable for producing in batches;
4, this system has the distortion less than 0.2% when the imaging of whole operating distance, when some specific range imaging distortion less than ten thousand/.
Description of drawings:
Below in conjunction with concrete legend the utility model is further specified:
Fig. 1 is the optical system diagram of the utility model machine vision camera lens when the 220mm object distance;
Fig. 2 is the optical system diagram of the utility model machine vision camera lens when the 700mm object distance;
Fig. 3 is the optical system diagram of the utility model machine vision camera lens when the infinity object distance;
Fig. 4 is the ray trajectory figure of the utility model machine vision camera lens when the 220mm object distance;
Fig. 5 is the ray trajectory figure of the utility model machine vision camera lens when the 700mm object distance;
Fig. 6 is the ray trajectory figure of the utility model machine vision camera lens when the infinity object distance;
Fig. 7 is the curvature of field and the distortion curve figure of the utility model machine vision camera lens when the 220mm object distance;
Fig. 8 is the curvature of field and the distortion curve figure of the utility model machine vision camera lens when the 700mm object distance;
Fig. 9 is the curvature of field and the distortion curve figure of the utility model machine vision camera lens when the infinity object distance;
Figure 10 is the optical transfer function curve map of the utility model machine vision camera lens when the 220mm object distance;
Figure 11 is the optical transfer function curve map of the utility model machine vision camera lens when the 700mm object distance;
Figure 12 is the optical transfer function curve map of the utility model machine vision camera lens when the infinity object distance;
Figure 13 is the point range figure of the utility model machine vision camera lens when the 220mm object distance;
Figure 14 is the point range figure of the utility model machine vision camera lens when the 700mm object distance;
Figure 15 is the point range figure of the utility model machine vision camera lens when the infinity object distance;
Embodiment:
With reference to Fig. 1, Fig. 2 and Fig. 3, be respectively the optical system diagram of vision lens when 220mm, 700mm and infinity object distance.
Optical system in the high definition machine vision camera lens of the utility model adopts 6 groups of 7 lens arrangements; Optical system lens group is made up of the focusing group with positive light coke and the fixation group of positive light coke; Said focusing group U1, fixation group U2 along optical axis from the series arrangement of object space side direction as planar side; Said focusing group is made up of positive lens L1, positive lens L2, negative lens L3, light hurdle S, negative lens L4, positive lens L5, positive lens L6 from object space side direction image planes direction successively, and wherein negative lens L4, positive lens L5 form a cemented doublet group; Negative lens L4 in the said cemented doublet group, positive lens L5 are made up of flint glass and heavy-lanthanide flint glass respectively; The total focal length of focusing group U1 is for just; Said fixation group U2 is made up of positive lens L7.Focusing group U1 moves forward and backward in the focusing process, and object distance changes the object space aperture angle cause and changes the aberration that brings and can organize U1 through focusing and change with fixation group U2 relative position and be compensated, thereby at the image of whole work little distortion of acquisition in the scope, high picture element.
Each lens is spherical lens among wherein focusing group U1, the fixation group U2, is formed by homemade crown board, flint, dense flint, lanthanum crown board, lanthanum flint, heavy-lanthanide flint glass combination respectively.
Fig. 1, the system diagram when being the 220mm object distance, Fig. 2, the system diagram when being the 700mm object distance, Fig. 3, the system diagram when being the unlimited distance object distance.Interval when dl is the 220mm object distance between U1 and the U2, the interval when ds is the infinity object distance between U1 and the U2, the utility model is compared with whole group of conventional tight shot that moves focusing for the fixed-focus system of fixing back group focusing, and is structurally more not complicated.
In order to make in this camera lens the last imaging of different working distance clear, the focal power that is distributed in focusing group U1 is wanted rationally, and satisfies following inequality: 0.1＜| f1/f2|, wherein f1 is the combined focal length of focusing group U1, f2 is the focal length of fixation group U2.
The normalized parameter of the utility model high definition machine vision camera lens is following:
Referring to Fig. 4, Fig. 5, Fig. 6 is the ray trajectory figure of high definition machine vision camera lens when 220mm, 700mm, unlimited distance object distance of the utility model.
Referring to Fig. 7, Fig. 8, Fig. 9 is the curvature of field and the distortion curve figure of high definition machine vision camera lens when 220mm, 700mm, unlimited distance object distance of the utility model.
Referring to Figure 10, Figure 11, Figure 12 is the optical transfer function curve map of high definition machine vision camera lens when 220mm, 700mm, unlimited distance object distance of the utility model.
Referring to Figure 13, Figure 14, Figure 15 is the point range figure of high definition machine vision camera lens when 220mm, 700mm, unlimited distance object distance of the utility model.
The design objective that the utility model relates to, its designing and calculating tool software is ZEMAX, and above-mentioned chart draws by ZEMAX, and trial product uses the optical transfer function tester to detect.
Claims (4)
1. a high definition focuses the machine vision camera lens; Comprise focusing group and fixation group in the optical system lens group; It is characterized in that: said optical system lens group is made up of the focusing group with positive light coke and the fixation group of positive light coke, and from the series arrangement of object space side direction as planar side, the combined focal length of said focusing group is f1 along optical axis for said focusing group, fixation group; The focal length of fixation group is f2, should satisfy following inequality: 0.1＜| f1/f2|＜0.35.
2. high definition according to claim 1 focuses the machine vision camera lens; It is characterized in that: said focusing group is made up of positive lens L1, positive lens L2, negative lens L3, light hurdle S1, negative lens L4, positive lens L5, positive lens L6 from object space side direction image planes direction successively; Wherein negative lens L4, positive lens L5 form a cemented doublet group, and the total focal length of focusing group U1 is for just; Said fixation group U2 is made up of positive lens L7.
3. high definition according to claim 2 focuses the machine vision camera lens, it is characterized in that: the negative lens L4 in the said cemented doublet group, positive lens L5 are made up of flint glass and heavy-lanthanide flint glass respectively.
4. high definition according to claim 1 focuses the machine vision camera lens, it is characterized in that: each lens in said focusing group, the fixation group are spherical lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202806480U CN202217098U (en) | 2011-08-03 | 2011-08-03 | High-definition focusing machine visual lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202806480U CN202217098U (en) | 2011-08-03 | 2011-08-03 | High-definition focusing machine visual lens |
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| Publication Number | Publication Date |
|---|---|
| CN202217098U true CN202217098U (en) | 2012-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202806480U Withdrawn - After Issue CN202217098U (en) | 2011-08-03 | 2011-08-03 | High-definition focusing machine visual lens |
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| Country | Link |
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| CN (1) | CN202217098U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253465A (en) * | 2011-08-03 | 2011-11-23 | 福建省光学技术研究所 | Vision lens of high-definition fixed-focus machine |
| CN109283651A (en) * | 2018-12-12 | 2019-01-29 | 广东奥普特科技股份有限公司 | A kind of high-resolution machine visual lens structure small in size |
-
2011
- 2011-08-03 CN CN2011202806480U patent/CN202217098U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253465A (en) * | 2011-08-03 | 2011-11-23 | 福建省光学技术研究所 | Vision lens of high-definition fixed-focus machine |
| CN109283651A (en) * | 2018-12-12 | 2019-01-29 | 广东奥普特科技股份有限公司 | A kind of high-resolution machine visual lens structure small in size |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120509 Effective date of abandoning: 20130306 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20120509 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |