CN104977691A - Method for improving centering precision of cemented lens based on error distribution method - Google Patents
Method for improving centering precision of cemented lens based on error distribution method Download PDFInfo
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- CN104977691A CN104977691A CN201510353784.0A CN201510353784A CN104977691A CN 104977691 A CN104977691 A CN 104977691A CN 201510353784 A CN201510353784 A CN 201510353784A CN 104977691 A CN104977691 A CN 104977691A
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- balsaming lens
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000009826 distribution Methods 0.000 title claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims abstract description 32
- 239000011435 rock Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
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Abstract
The invention relates to a method for improving the centering precision of a cemented lens based on an error distribution method, which comprises the following steps of: determining the spherical center positions of the 1 surface, the 2 surface and the 3 surface of the cemented lens focused by the inner focusing telescope, and searching the spherical center auto-collimation image points of each surface of the cemented lens on a PC (personal computer) to form a virtual triangle; adjusting the attitude control tool, and controlling the three spherical center auto-collimation image points to shake until the two spherical center auto-collimation image points on the longest side in the virtual triangle do not shake; adjusting an attitude control tool, and controlling the three spherical center auto-collimation image points to shake, so that the shaking amounts of the two spherical center auto-collimation images on the longest side and the third spherical center auto-collimation image are both H/2; the invention solves the technical problem of large optical axis eccentricity of the existing cemented lens, the shaking amounts of the three spherical center images are uniform and consistent, and the found optical axis eccentricity is the minimum.
Description
Technical field
The invention belongs to optics and debug detection field, particularly relate to a kind of based on error distribution method raising balsaming lens centering precision method.
Background technology
Curvature triangulation method is that the optical axis of balsaming lens is determined to provide theoretical foundation; Error distribution method is that the high precision fixed core of balsaming lens provides theoretical foundation; According to curvature Vector triangle, the leg-of-mutton longest edge of curvature is selected to be the optical axis of cemented doublet.As shown in Figure 1, two gummed mirror has three faces, 1 face 31, face 21,3, face 11,2, to the image of spherical center of image of spherical center 22,3 of image of spherical center 12,2 that should have 1; Wherein 2 is the cemented surface bonding plane that is two optical element curvature are identical.Can be known by optical theory, each optical surface have a center of curvature and 3 centers of curvature of two gummed mirror point-blank, this straight line is exactly the optical axises of two gummed mirror.
In actual lens gluing procedures, due to bondline thickness, alignment precision, operating personnel's subjective factor equal error, cause three centers of curvature of the lens after gummed not point-blank, as shown in Figure 2, the center of curvature in three faces is connected to form a curvature triangle between two.After cemented doublet being fixed on centering frock, can observe 3 centre of sphere autocollimation pictures by internal focusing telescope, any two images of spherical center can determine the optical axis of a gummed mirror, now how to determine that the optical axis gluing together mirror becomes a key issue.Traditional gummed mirror centering selects optical axis only with the working experience of operating personnel, select the optical axis benchmark of centre of sphere line as centering processing of gummed mirror first surface and last one side, adjust these two images of spherical center not rock, and then the relevant fit dimension of turning gummed picture frame, complete process.
The method shortcoming:
1, centering processing optical axis is selected to have no basis, and can not reach best centering precision;
2, during batch production, rejection rate is higher, and can not find reason.
This balsaming lens to be installed in gesture stability frock and to rotate high-accuracy revolving shaft, being searched out the autocollimation reflection image of 1 centre of sphere and 2 centre ofs sphere by internal focusing telescope, two pictures being adjusted to and not rocking.The optical axis of balsaming lens overlaps with high-precision rotary axle herein.Then find and observe 3 centre of sphere autocollimation reflection images, now 3 image surface point shaking volume are the 2*H i.e. offset of balsaming lens for this reason.
Summary of the invention
In order to solve the existing technical matters that the optical axis offset of balsaming lens is large of determining, the invention provides a kind of method improving balsaming lens centering precision based on error distribution method
Technical solution of the present invention:
Improve the method for balsaming lens centering precision based on error distribution method, its difference is: comprise the following steps:
1] optical system is built:
Comprising pose adjustment frock described in lathe revolving shaft, gesture stability frock, picture frame, internal focusing telescope, CCD camera and PC is arranged on lathe revolving shaft, described picture frame is arranged on one end of pose adjustment frock, described internal focusing telescope is positioned at the dead ahead of the exit window of picture frame, and the other end of internal focusing telescope is connected with PC by CCD camera; Picture frame internal fixtion has balsaming lens; Balsaming lens 1 facing to internal focusing telescope, 2 of balsaming lens is cemented surface, and 3 of balsaming lens is towards gesture stability frock;
2] internal focusing telescope is accommodated to the sphere center position of 1,2,3 of balsaming lens, PC is found the centre of sphere autocollimation picture point of each of balsaming lens, form an empty triangle;
3] gesture stability frock is adjusted, control three centre of sphere autocollimation picture points to rock, until two centre of sphere autocollimation picture points of longest edge in empty triangle are not rocked, the shaking volume of the 3rd centre of sphere autocollimation picture is 2H, and wherein H is be do height in the end with longest edge in empty triangle;
4] adjust gesture stability frock, control three centre of sphere autocollimation picture points and rock, make the shaking volume of two of longest edge centre of sphere autocollimation pictures and the 3rd centre of sphere autocollimation picture be H/2; The optical axis of balsaming lens is determined, overlaps the while that namely balsaming lens optical axis being the straight line of the empty leg-of-mutton longest edge formation of translation H/2 apicad with the centre of gyration of lathe revolving shaft.
The advantage that the present invention has:
1, the shaking volume of three images of spherical center evenly, unanimously;
2, the maximum shaking volume of gummed mirror is reduced half, namely centering precision is doubled;
3, the method can be applied to many mirrors gummed optical element;
Accompanying drawing explanation
Fig. 1 is ideally balsaming lens schematic diagram;
Fig. 2 is balsaming lens schematic diagram under reality;
Fig. 3 is the system architecture schematic diagram determining balsaming lens optical axis;
Fig. 4 is for determining balsaming lens optical axis process schematic;
Fig. 5 is for determining balsaming lens optical axis principle schematic;
Wherein Reference numeral is: 1-lathe revolving shaft, 2-gesture stability frock, 3-picture frame, 4-balsaming lens, 5-internal focusing telescope, 6-CCD camera, 7-PC machine, 11-1 face, 21-2 face, 31-3 face, the image of spherical center in 12-1 face, the image of spherical center in 22-2 face, the image of spherical center in 32-3 face.
Embodiment
After proposing a kind of optical axis of new method (error distribution method or optical axis shifting method) the foundation curvature triangulation method determination cemented doublet improving balsaming lens centering precision herein, determine the offset of balsaming lens as stated above.Respectively vertical line is done to its corresponding line segment in leg-of-mutton for curvature three summits, as shown in Figure 4, vertical line is respectively h1, h2, h3, and from geometric triangulation shape law of correlation, the vertical line that triangle longest edge is corresponding is the shortest.That is, be adjusted to by two the longest for composition curvature triangle length of side images of spherical center and do not rock, the 3rd image of spherical center shaking volume is now minimum.Then control the shaking volume reducing 3 centre of sphere autocollimation reflection images, control the shaking volume (being equivalent to the shaking volume of 3 centre of sphere reflection images to be assigned in the reflection image shaking volume of 1 and 2) of increase by 1 and 2 centre of sphere autocollimation reflection images herein, the continuous shaking volume adjusting guarantee 3 spherical balls oculo cardiac reflex pictures is equal simultaneously.Now 3 centre of sphere reflection images all to be rocked but shaking volume is all less than 2*H and is all H/2, and the offset precision of gummed mirror improves 4 times.Glue together mirror optical axis herein also to determine, optical axis moves to the center of 3 centre of sphere vertical lines by original 1,2 centre of sphere lines and overlap with precise rotary shaft (being equivalent to optical axis direction is shifted).
Concrete steps:
1.1] optical system is built, as shown in Figure 3:
Comprising pose adjustment frock described in lathe revolving shaft, gesture stability frock, picture frame, internal focusing telescope, CCD camera and PC is arranged on lathe revolving shaft, described picture frame is arranged on one end of pose adjustment frock, described internal focusing telescope is positioned at the dead ahead of the exit window of picture frame, and the other end of internal focusing telescope is connected with PC by CCD camera; Picture frame internal fixtion has balsaming lens; Balsaming lens 1 facing to internal focusing telescope, 2 of balsaming lens is cemented surface, and 3 of balsaming lens is towards gesture stability frock;
2. utilize internal focusing telescope to accommodate to two sphere center positions of curvature triangle longest edge, find two centre of sphere autocollimation reflection picture points;
2., by level and the pitch attitude of adjustment frock, control the shaking volume of balsaming lens curvature triangle longest edge two sides image of spherical center, two picture points are not rocked;
3. now found by internal focusing telescope and observe the centre of sphere reflection image in the 3rd face, obtaining the offset 2*H that its picture point shaking volume is balsaming lens;
4. the shaking volume part of the 3rd centre of sphere reflection image is allocated in 1,2 images of spherical center, the shaking volume repeatedly adjusting guarantee 3 centre of sphere reflection images is equal;
5. the optical axis that now balsaming lens is final is determined, being positioned at above curvature triangle longest edge and overlapping with precise rotary shaft, the shaking volume of balsaming lens is also reduced to H/2.As shown in Figure 5.
Claims (1)
1. improve the method for balsaming lens centering precision based on error distribution method, it is characterized in that: comprise the following steps:
1] optical system is built:
Comprising pose adjustment frock described in lathe revolving shaft, gesture stability frock, picture frame, internal focusing telescope, CCD camera and PC is arranged on lathe revolving shaft, described picture frame is arranged on one end of pose adjustment frock, described internal focusing telescope is positioned at the dead ahead of the exit window of picture frame, and the other end of internal focusing telescope is connected with PC by CCD camera; Picture frame internal fixtion has balsaming lens; Balsaming lens 1 facing to internal focusing telescope, 2 of balsaming lens is cemented surface, and 3 of balsaming lens is towards gesture stability frock;
2] internal focusing telescope is accommodated to the sphere center position of 1,2,3 of balsaming lens, PC is found the centre of sphere autocollimation picture point of each of balsaming lens, form an empty triangle;
3] gesture stability frock is adjusted, control three centre of sphere autocollimation picture points to rock, until two centre of sphere autocollimation picture points of longest edge in empty triangle are not rocked, the shaking volume of the 3rd centre of sphere autocollimation picture is 2H, and wherein H is be do height in the end with longest edge in empty triangle;
4] adjust gesture stability frock, control three centre of sphere autocollimation picture points and rock, make the shaking volume of two of longest edge centre of sphere autocollimation pictures and the 3rd centre of sphere autocollimation picture be H/2; The optical axis of balsaming lens is determined, overlaps the while that namely balsaming lens optical axis being the straight line of the empty leg-of-mutton longest edge formation of translation H/2 apicad with the centre of gyration of lathe revolving shaft.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510353784.0A CN104977691B (en) | 2015-06-24 | 2015-06-24 | Method for improving centering precision of cemented lens based on error distribution method |
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| CN201510353784.0A CN104977691B (en) | 2015-06-24 | 2015-06-24 | Method for improving centering precision of cemented lens based on error distribution method |
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| CN104977691B CN104977691B (en) | 2017-07-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111338390A (en) * | 2020-04-08 | 2020-06-26 | 西安光衡光电科技有限公司 | Cemented lens centering control method and system and full-automatic cementing equipment |
| CN114770766A (en) * | 2022-05-12 | 2022-07-22 | 北京创思工贸有限公司 | Method and process for improving cemented lens machining process based on centering turning |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2031931U (en) * | 1988-01-26 | 1989-02-01 | 中国科学院长春光机所 | Photoelectric automatic centering device for optical lenses |
| CN1755408A (en) * | 2004-09-28 | 2006-04-05 | 亚洲光学股份有限公司 | Method and tool for centering processing of lens |
| US20070091473A1 (en) * | 2005-10-14 | 2007-04-26 | Fujinon Corporation | Method for manufacturing cemented lens, cemented lens and projector apparatus |
| CN202067011U (en) * | 2011-05-12 | 2011-12-07 | 江苏宇迪光学股份有限公司 | Centering clamp for special-shaped optical lens gluing |
| CN202256829U (en) * | 2011-09-23 | 2012-05-30 | 重庆皓然仪器仪表有限公司 | Optical lens bonding apparatus |
| CN102538689A (en) * | 2011-12-29 | 2012-07-04 | 中国科学院上海光学精密机械研究所 | Centering and locating device of optical system and using method thereof |
| CN102608727A (en) * | 2012-03-23 | 2012-07-25 | 中国科学院西安光学精密机械研究所 | Centering tool and method for determining reference of aspheric reflector by using same |
| CN203012221U (en) * | 2012-12-30 | 2013-06-19 | 郑林昆 | Automatic cementing centering instrument of optical lenses |
| CN103345073A (en) * | 2013-06-27 | 2013-10-09 | 中国科学院西安光学精密机械研究所 | single-lens optical axis positioning device and method |
-
2015
- 2015-06-24 CN CN201510353784.0A patent/CN104977691B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2031931U (en) * | 1988-01-26 | 1989-02-01 | 中国科学院长春光机所 | Photoelectric automatic centering device for optical lenses |
| CN1755408A (en) * | 2004-09-28 | 2006-04-05 | 亚洲光学股份有限公司 | Method and tool for centering processing of lens |
| US20070091473A1 (en) * | 2005-10-14 | 2007-04-26 | Fujinon Corporation | Method for manufacturing cemented lens, cemented lens and projector apparatus |
| CN202067011U (en) * | 2011-05-12 | 2011-12-07 | 江苏宇迪光学股份有限公司 | Centering clamp for special-shaped optical lens gluing |
| CN202256829U (en) * | 2011-09-23 | 2012-05-30 | 重庆皓然仪器仪表有限公司 | Optical lens bonding apparatus |
| CN102538689A (en) * | 2011-12-29 | 2012-07-04 | 中国科学院上海光学精密机械研究所 | Centering and locating device of optical system and using method thereof |
| CN102608727A (en) * | 2012-03-23 | 2012-07-25 | 中国科学院西安光学精密机械研究所 | Centering tool and method for determining reference of aspheric reflector by using same |
| CN203012221U (en) * | 2012-12-30 | 2013-06-19 | 郑林昆 | Automatic cementing centering instrument of optical lenses |
| CN103345073A (en) * | 2013-06-27 | 2013-10-09 | 中国科学院西安光学精密机械研究所 | single-lens optical axis positioning device and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111338390A (en) * | 2020-04-08 | 2020-06-26 | 西安光衡光电科技有限公司 | Cemented lens centering control method and system and full-automatic cementing equipment |
| CN114770766A (en) * | 2022-05-12 | 2022-07-22 | 北京创思工贸有限公司 | Method and process for improving cemented lens machining process based on centering turning |
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| CN104977691B (en) | 2017-07-28 |
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