CN105108186A - Error separation method of lens based on centering machining - Google Patents
Error separation method of lens based on centering machining Download PDFInfo
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- CN105108186A CN105108186A CN201510361721.XA CN201510361721A CN105108186A CN 105108186 A CN105108186 A CN 105108186A CN 201510361721 A CN201510361721 A CN 201510361721A CN 105108186 A CN105108186 A CN 105108186A
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- lens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B25/00—Accessories or auxiliary equipment for turning-machines
- B23B25/06—Measuring, gauging, or adjusting equipment on turning-machines for setting-on, feeding, controlling, or monitoring the cutting tools or work
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Abstract
The invention relates to an error separation method of lens based on centering machining. The method comprises establishing an optical system; finding auto-collimation images of centers of two spheres of a lens using the optical system, rotating a lathe rotator and coarsely adjusting an attitude control tool, to make the two images of centers of spheres low in shaking value; acquiring shaking values of the two images of centers of spheres through cooperation of a CCD camera and a PC; calculating an offset and an inclined value of the lens through bringing the shaking values of the two images of centers of spheres in a formula; finely adjusting the attitude control tool, until the offset and an inclined value of the lens are within a range of designed indexes. Aiming to solve the technical issue that a thin lens cannot accurately machined through a present centering machining method, the offset and the inclined value of an optical component are respectively calculated by using the error separation method, whether deigned indexes of the optical component meet requirements or not during centering machining can be examined on line, the precision of the lens can be raised.
Description
Technical field
The present invention relates to a kind of lens based on centering manufacturing tolerance separation method.
Background technology
In the past lenses centering processing after error characterization methods be only with its feel relieved lathe high-precision rotary time internal focusing telescope in image of spherical center shaking volume carry out characterizing.For the optical system of general 0.01mm-0.02mm axiality, this error characterization methods is enough accurate, debugs task after can completing centering fast and accurately.But for being less than the optical system of 0.01mm axiality, this method is not accurate enough, can not quantitative guidance follow-up debug work.
Spherical lens can be divided into planoconvex spotlight, plano-concave lens, biconvex lens, biconcave lens, positive meniscus lens, diverging meniscus lens, and any one lens can carry out optical centering processing.Spherical lens has two spheres, and as shown in Figure 1, one is A face 41 facing to internal focusing telescope, and another face internal focusing telescope is B face 42.Position towards the spherical balls imago of internal focusing telescope does not need to calculate, and its position is exactly the radius of curvature R of this A face sphere
a, and the spherical balls imago of internal focusing telescope needs the position calculating image of spherical center because of the refraction of light dorsad.
As shown in Figure 2, thin lens is that benchmark rocks at the intersection point not around its interarea and optical axis in process of feeling relieved, but around two image of spherical center (a, b) the intersection point O rocking envelope carries out rocking, so the tilt quantity of lens is θ in actual production process, actual offset is that Δ all carries out analyzing for benchmark with O point and calculates.
Summary of the invention
In order to solve existing lenses centering processing method for the not accurate enough technical problem of thin lens, the invention provides a kind of lens axis fixation method based on error separate.
Technical solution of the present invention:
Based on a lens axis fixation method for error separate, its special character is, comprises the following steps:
1] optical system is built:
Optical system comprises pose adjustment frock described in lathe gyroaxis, gesture stability frock, picture frame, internal focusing telescope, CCD camera and PC and is arranged on lathe gyroaxis, 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 lens; The A of lens is facing to interior instruction telescope, and the B of lens is facing to lathe gyroaxis;
2] found the centre of sphere auto-collimation picture of two spheres of lens by internal focusing telescope, boring-and-turning mill gyroaxis coarse adjustment gesture stability frock, make two image of spherical center shaking volume less;
3] PC is coordinated to catch the shaking volume (Da, Db) of calculating two image of spherical center by CCD camera;
4] shaking volume (Da, Db) of two images of spherical center is brought into offset and tilt quantity that formulae discovery goes out lens;
Tilt quantity θ=[Da/ (2*Loa)] * 206265=[Db/ (2*Lob)] * 206265;
Offset Δ=θ * (Lob+Rb+d)
Wherein: the Lab=a centre of sphere is apart from-b centre of sphere distance-lens center thickness d;
The radius of curvature R in a centre of sphere distance=A face
a;
The position L of b centre of sphere distance=B face image of spherical center, the type according to lens is determined by following several mode:
The position L of the B face image of spherical center of planoconvex spotlight:
The position L of the B face image of spherical center of plano-concave lens:
The position L of the B face image of spherical center of biconvex lens:
The position L of the B face image of spherical center of biconcave lens:
The position L of the B face image of spherical center of positive meniscus lens:
The position L of the B face image of spherical center of diverging meniscus lens:
R
bfor the radius of curvature in lens B face, R
afor the radius of curvature in lens A face, N is lens material refractive index, and d is lens center thickness;
Loa is that centre of sphere a rocks the distance of envelope intersection point o to two centre ofs sphere;
Lob is that centre of sphere b rocks the distance of envelope intersection point o to two centre ofs sphere;
Loa+Lob＝Lab
5] accurate adjustment gesture stability frock, Adjustment principle is:
In preferential adjustment offset and tilt quantity, numerical value is larger, if offset is suitable with tilt quantity numerical value, preferentially adjusts tilt quantity;
Method of adjustment is: control offset by upper and lower, the left and right translation of adjustment gesture stability frock; Tilt quantity is controlled by the pitching, the orientation that adjust gesture stability frock;
6] step 5 is repeated] until, make the offset of lens and tilt quantity all within design objective scope;
7] now the optical axis of lens is determined, i.e. lens axis and lathe gyroaxis center superposition.
The advantage that the present invention has:
Can the present invention, by the offset of optical element and the decouples computation of tilt quantity, can meet the requirement of design objective, also can carry out quantitative fine setting for its sensitive indicator and instruct, improve the precision of lens in X-ray inspection X optical element centering processing.
Accompanying drawing explanation
Fig. 1 is lens arrangement schematic diagram;
Fig. 2 is lens arrangement schematic diagram;
Fig. 3 is the lens dead axle system based on error separate;
Fig. 4 is principle schematic of the present invention;
Wherein Reference numeral is: 1-lathe gyroaxis, 2-gesture stability frock, 3-picture frame, 4-lens, 41-A face, 42-B face, 5-internal focusing telescope, 6-CCD camera, 7-PC machine.
Detailed description of the invention
As Figure 1-3, thin lens is that benchmark rocks at the intersection point not around its interarea and optical axis in process of feeling relieved, but carry out rocking around the intersection point O that two images of spherical center rock envelope, so the tilt quantity of lens is θ in actual production process, actual offset is that Δ all carries out analyzing for benchmark with o point and calculates.By to the offset of optical element and the calculating of tilt quantity, can meet the requirement of design objective in X-ray inspection X optical element centering processing, also can carry out quantitative fine setting for its sensitive indicator and instruct.
Based on a lens axis fixation method for error separate, comprise the following steps:
1] optical system is built:
Optical system comprises lathe gyroaxis 1, gesture stability frock 2, picture frame 3, internal focusing telescope 5, CCD camera 6 and PC 7, pose adjustment frock is arranged on lathe gyroaxis, 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 lens 4; The A face 41 of lens is towards interior instruction telescope, and the B face 42 of lens is towards lathe gyroaxis;
2] found the centre of sphere auto-collimation picture of two spheres of lens by internal focusing telescope, boring-and-turning mill gyroaxis coarse adjustment gesture stability frock, make two image of spherical center shaking volume less;
3] PC is coordinated to catch the shaking volume (Da, Db) of calculating two image of spherical center by CCD camera;
4] shaking volume (Da, Db) of two images of spherical center is brought into offset and tilt quantity that formulae discovery goes out lens;
Tilt quantity θ=[Da/ (2*Loa)] * 206265=[Db/ (2*Lob)] * 206265;
Offset Δ=θ * (Lob+Rb+d)
Wherein: the Lab=a centre of sphere is apart from-b centre of sphere distance-lens center thickness d;
The radius of curvature R in a centre of sphere distance=A face
a;
The position L of b centre of sphere distance=B face image of spherical center, the type according to lens is determined by following several mode:
The position L of the B face image of spherical center of planoconvex spotlight:
The position L of the B face image of spherical center of plano-concave lens:
The position L of the B face image of spherical center of biconvex lens:
The position L of the B face image of spherical center of biconcave lens:
The position L of the B face image of spherical center of positive meniscus lens:
The position L of the B face image of spherical center of diverging meniscus lens:
R
bfor the radius of curvature in lens B face, R
afor the radius of curvature in lens A face, N is lens material refractive index, and d is lens center thickness;
Loa is that centre of sphere a rocks the distance of envelope intersection point o to two centre ofs sphere;
Lob is that centre of sphere b rocks the distance of envelope intersection point o to two centre ofs sphere;
Loa+Lob=Lab; As shown in Figure 4,
5] accurate adjustment gesture stability frock, Adjustment principle is:
In preferential adjustment offset and tilt quantity, numerical value is larger, if offset is suitable with tilt quantity numerical value, preferentially adjusts tilt quantity;
Method of adjustment is: control offset by upper and lower, the left and right translation of adjustment gesture stability frock; Tilt quantity is controlled by the pitching, the orientation that adjust gesture stability frock;
6] step 5 is repeated] until, make the offset of lens and tilt quantity all within design objective scope;
7] now the optical axis of lens is determined, i.e. lens axis and lathe gyroaxis center superposition.
The concrete grammar used:
1. found the centre of sphere auto-collimation picture of two spheres of balsaming lens by internal focusing telescope, boring-and-turning mill main shaft coarse adjustment gesture stability frock, make two image of spherical center shaking volume less;
2. the shaking volume of calculating two image of spherical center is caught by CCD camera matching computer;
3. the shaking volume of two images of spherical center is brought into offset and the tilt quantity that above-mentioned formulae discovery goes out lens;
4. accurate adjustment gesture stability frock, Adjustment principle is: preferentially adjust numerical value in offset and tilt quantity larger, if offset is suitable with tilt quantity numerical value, preferentially adjusts tilt quantity.Within design objective scope must be adjusted to;
5. accurate adjustment gesture stability frock, method of adjustment is: control offset by upper and lower, the left and right translation of adjustment gesture stability frock; Tilt quantity is controlled by the pitching, the orientation that adjust gesture stability frock;
6. repeatedly adjust according to the method described above, make the offset of lens and tilt quantity all within design objective scope.Now the optical axis of lens is determined, i.e. its optical axis and lathe spindle center superposition.Turning structural member region of interest, ensures concentricity and the perpendicularity of itself and lens axis.
Claims (1)
1. lens are based on a centering manufacturing tolerance separation method, it is characterized in that, comprise the following steps:
1] optical system is built:
Optical system comprises pose adjustment frock described in lathe gyroaxis, gesture stability frock, picture frame, internal focusing telescope, CCD camera and PC and is arranged on lathe gyroaxis, 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 lens; The A of lens is facing to interior instruction telescope, and the B of lens is facing to lathe gyroaxis;
2] found the centre of sphere auto-collimation picture of two spheres of lens by internal focusing telescope, boring-and-turning mill gyroaxis coarse adjustment gesture stability frock, make two image of spherical center shaking volume less;
3] PC is coordinated to catch the shaking volume (Da, Db) of calculating two image of spherical center by CCD camera;
4] shaking volume (Da, Db) of two images of spherical center is brought into offset and tilt quantity that formulae discovery goes out lens;
Tilt quantity θ=[Da/ (2*Loa)] * 206265=[Db/ (2*Lob)] * 206265;
Offset Δ=θ * (Lob+Rb+d)
Wherein: the Lab=a centre of sphere is apart from-b centre of sphere distance-lens center thickness d;
The radius of curvature R in a centre of sphere distance=A face
a;
The position L of b centre of sphere distance=B face image of spherical center, the type according to lens is determined by following several mode:
The position L of the B face image of spherical center of planoconvex spotlight:
The position L of the B face image of spherical center of plano-concave lens:
The position L of the B face image of spherical center of biconvex lens:
The position L of the B face image of spherical center of biconcave lens:
The position L of the B face image of spherical center of positive meniscus lens:
The position L of the B face image of spherical center of diverging meniscus lens:
R
bfor the radius of curvature in lens B face, R
afor the radius of curvature in lens A face, N is lens material refractive index, and d is lens center thickness;
Loa is that centre of sphere a rocks the distance of envelope intersection point o to two centre ofs sphere;
Lob is that centre of sphere b rocks the distance of envelope intersection point o to two centre ofs sphere;
Loa+Lob＝Lab
5] accurate adjustment gesture stability frock, Adjustment principle is:
In preferential adjustment offset and tilt quantity, numerical value is larger, if offset is suitable with tilt quantity numerical value, preferentially adjusts tilt quantity;
Method of adjustment is: control offset by upper and lower, the left and right translation of adjustment gesture stability frock; Tilt quantity is controlled by the pitching, the orientation that adjust gesture stability frock;
6] step 5 is repeated] until, make the offset of lens and tilt quantity all within design objective scope;
7] now the optical axis of lens is determined, i.e. lens axis and lathe gyroaxis center superposition.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117029874A (en) * | 2023-07-14 | 2023-11-10 | 北京自动化控制设备研究所 | Hemispherical gyroscope assembly error rapid identification method and adjusting device |
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| EP2458321A1 (en) * | 2010-11-29 | 2012-05-30 | Trioptics GmbH | Method and device for measuring distances between optical areas of an optical system |
| CN102944194A (en) * | 2012-11-21 | 2013-02-27 | 中国科学院光电技术研究所 | High-accuracy high-order aspherical lens eccentricity measuring system and method |
| CN102998767A (en) * | 2012-11-20 | 2013-03-27 | 北京空间机电研究所 | Installation and adjustment method of infrared lenses |
| CN103017686A (en) * | 2012-12-04 | 2013-04-03 | 中国科学院光电技术研究所 | Method for adjusting primary mirror optical axis to be perpendicularly to horizontal axis by using laser tracker |
| 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 optic axis positioning device and method |
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2015
- 2015-06-25 CN CN201510361721.XA patent/CN105108186A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1420339A (en) * | 2001-11-20 | 2003-05-28 | 奥林巴斯光学工业株式会社 | Non-spheric eccentricity measuring method and device |
| US20050128468A1 (en) * | 2003-11-28 | 2005-06-16 | Canon Kabushiki Kaisha | Eccentricity measuring method and eccentricity measuring apparatus |
| CN101387761A (en) * | 2008-10-08 | 2009-03-18 | 上海微电子装备有限公司 | Center aligning assembling and regulating apparatus and method for optical system |
| EP2458321A1 (en) * | 2010-11-29 | 2012-05-30 | Trioptics GmbH | Method and device for measuring distances between optical areas of an optical system |
| CN102998767A (en) * | 2012-11-20 | 2013-03-27 | 北京空间机电研究所 | Installation and adjustment method of infrared lenses |
| CN102944194A (en) * | 2012-11-21 | 2013-02-27 | 中国科学院光电技术研究所 | High-accuracy high-order aspherical lens eccentricity measuring system and method |
| CN103017686A (en) * | 2012-12-04 | 2013-04-03 | 中国科学院光电技术研究所 | Method for adjusting primary mirror optical axis to be perpendicularly to horizontal axis by using laser tracker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117029874A (en) * | 2023-07-14 | 2023-11-10 | 北京自动化控制设备研究所 | Hemispherical gyroscope assembly error rapid identification method and adjusting device |
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Application publication date: 20151202 |