CN103439089B - The automatic calibration device in focal surface of collimator tube position and Calibration Method - Google Patents

The automatic calibration device in focal surface of collimator tube position and Calibration Method Download PDF

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Publication number
CN103439089B
CN103439089B CN201310390086.9A CN201310390086A CN103439089B CN 103439089 B CN103439089 B CN 103439089B CN 201310390086 A CN201310390086 A CN 201310390086A CN 103439089 B CN103439089 B CN 103439089B
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China
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pentagonal prism
graticule
translation stage
parallel light
tube
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CN201310390086.9A
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Chinese (zh)
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CN103439089A (en
Inventor
李坤
陈永权
赵建科
段亚轩
龙江波
薛璐
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中国科学院西安光学精密机械研究所
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Priority to CN201310390086.9A priority Critical patent/CN103439089B/en
Publication of CN103439089A publication Critical patent/CN103439089A/en
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Abstract

The present invention relates to the automatic calibration device in a kind of focal surface of collimator tube position and Calibration Method, device comprises graticule, pentagonal prism, sighting system and main control computer; Tested parallel light tube is arranged between graticule and pentagonal prism; Pentagonal prism is arranged at the light-emitting window place of tested parallel light tube; Sighting system is arranged on the emitting light path of light path after pentagonal prism turnover; Main control computer controls the movement of graticule and pentagonal prism respectively and controls the image data acquiring of sighting system.The invention provides a kind of calibration efficiency is high and parallax error the is low automatic calibration device in focal surface of collimator tube position and Calibration Method.

Description

The automatic calibration device in focal surface of collimator tube position and Calibration Method

Technical field

The invention belongs to optical field, relate to the automatic calibration device in a kind of focal surface of collimator tube position and Calibration Method, particularly relate to a kind of calibration of heavy caliber focal surface of collimator tube position, the evaluation of beam collimation and the measurement mechanism of focal length thereof and method.

Background technology

At present, in the calibration process of heavy caliber parallel light tube, extensive employing pentagonal prism method, the method by pentagonal prism in the interscan of parallel light tube clear aperture, when parallel light tube is focused, make the lengthwise position error of graticule become the lateral attitude amount of movement observing graticule picture, thus obtain parallel light tube light beam collimation data, and determine the position of focal plane of parallel light tube with this.

The method that the measurement of the lateral attitude amount of movement of graticule picture adopts usually receives with transit, human eye aims at reading, therefore exist transit angle measurement accuracy limited cause calibration precision not, tester aims at the problems such as the difference that custom is different, visual fatigue is introduced.Simultaneously, in calibration process, also operating personnel are needed to judge the relation of the actual position of focal plane of parallel light tube and desirable position of focal plane according to the lateral attitude moving direction of the direction of scanning of pentagonal prism and graticule picture, calibration process will adjust the actual position of focal plane of parallel light tube repeatedly, repeat the scanning of pentagonal prism in parallel light tube clear aperture, until the lateral attitude amount of movement of graticule picture is minimum, then think that calibration terminates.Therefore, adopt the pentagonal prism method workload of artificial aiming interpretation large, efficiency is low, and calibration precision is low.

Summary of the invention

In order to solve the above-mentioned technical matters existed in background technology, the invention provides a kind of calibration efficiency is high and parallax error the is low automatic calibration device in focal surface of collimator tube position and Calibration Method.

Technical solution of the present invention is: the invention provides the automatic calibration device in a kind of focal surface of collimator tube position, its special character is: described device comprises graticule, pentagonal prism, sighting system and main control computer; Tested parallel light tube is arranged between graticule and pentagonal prism; Described pentagonal prism is arranged at the light-emitting window place of tested parallel light tube; Described sighting system is arranged on the emitting light path of light path after pentagonal prism turnover; Described main control computer controls the movement of graticule and pentagonal prism respectively and controls the image data acquiring of sighting system.

The automatic calibration device in above-mentioned focal surface of collimator tube position also comprises the mobile platform be connected with main control computer; Described main control computer controls the movement of graticule and pentagonal prism respectively by mobile platform.

Above-mentioned mobile platform comprises image planes translation stage, and described graticule is placed on image planes translation stage; Described main control computer is connected with image planes translation stage.

Above-mentioned mobile platform comprises pentagonal prism scanning translation stage, and described pentagonal prism is placed on pentagonal prism scanning translation stage; Described main control computer and pentagonal prism scan translation stage and are connected.

Above-mentioned mobile platform comprises precise rotating platform; Described sighting system is placed on precise rotating platform; Described main control computer is connected with sighting system.

Above-mentioned sighting system comprises standard collimator objective and ccd image harvester; Described standard collimator objective and ccd image harvester are set in turn on the emitting light path of light path after pentagonal prism turnover.

Based on a Calibration Method for the automatic calibration device in focal surface of collimator tube position as above, its special character is: said method comprising the steps of:

1) open tested parallel light tube automatic light source, illuminate the differentiation plate being equipped on image planes translation stage;

2) pentagonal prism is scanned before translation stage is placed in the light-emitting window of tested parallel light tube, and pentagonal prism is fixed on the objective table of pentagonal prism scanning translation stage;

3) be installed on precise rotating platform by the sighting system be made up of standard collimator objective and ccd image harvester, the standard collimator objective of making is placed in the spindle central of precise rotating platform;

4) drive pentagonal prism in the full clear aperture interscan of tested parallel light tube by pentagonal prism scanning translation stage, adjustment pentagonal prism scanning translation stage, make the light after pentagonal prism is turned back in pentagonal prism scanning translation stage scanning moving process, all received by the sighting system of standard collimator objective and ccd image harvester composition;

5) when the differentiation current location of plate differs larger with the desirable image planes position of tested parallel light tube, pentagonal prism scanning translation stage drives pentagonal prism to scan movement among a small circle in the bright dipping aperture of tested parallel light tube, by the interpretation of ccd image harvester Real-time Collection, determine the moving direction breaking up picture, can be determined now to break up the position of plate and the relation of desirable position of focal plane by the direction of scanning of pentagonal prism and the moving direction of graticule picture, determine the moving direction breaking up plate;

6) moving direction determined by step 5) moves differentiation plate by image planes translation stage with little step-length, repeat step 5), until move in the full bright dipping aperture interscan of tested parallel light tube, the lateral attitude amount of movement of graticule picture is minimum, now break up the current location of plate and the desirable image planes position consistency of tested parallel light tube, the calibration of tested focal surface of collimator tube position is complete.

7) main control computer controls precise rotating platform rotation; The line pair of known live width on graticule is aimed in the collection of ccd image harvester, records the angle that now turntable is corresponding, by precision angle method, demarcates the focal length of tested parallel light tube.

Advantage of the present invention is:

The invention provides the automatic calibration device in a kind of focal surface of collimator tube position and Calibration Method, this device is made up of standard collimator objective, graticule, pentagonal prism, ccd image harvester, high precision image planes translation stage, pentagonal prism scanning translation stage, main control computer, precise rotating platform.The robotization that the present invention adopts CCD imaging, image procossing automatic interpretation, program setting can realize pentagonal prism method calibration heavy caliber parallel light tube, reduce the workload of operating personnel, improve calibration efficiency, it also avoid the error of different personnel's interpretation, calibration result precision is high, reproducible simultaneously.After position of focal plane is determined, main control computer control precise rotating platform rotation respective angles, ccd image harvester aim at the line pair on the differentiation plate of known live width, by precision angle method, automatically measure the focal length of parallel light tube.

1, the present invention utilizes ccd image treatment technology and Computer Control Technology to achieve the automatic Calibration of the automatic calibration in heavy caliber focal surface of collimator tube position and parallel light tube focal length, improves testing efficiency.

2, the present invention's distributing rationally by standard collimator objective and CCD, ccd image treatment technology, improves calibration precision, and the calibration precision of this device can reach 0.5 ", and usually artificial calibration precision is 1 ".

3, by the programmed control of calibration process and the interpretation of image procossing, improve the degree of confidence of calibration result.Avoid the error that calibration personnel bring into because aiming at custom difference.

Accompanying drawing explanation

Fig. 1 is the structural representation of the automatic calibration device in focal surface of collimator tube position provided by the present invention;

Wherein:

1-image planes translation stage; 2-graticule; 3-pentagonal prism; 4-pentagonal prism scanning translation stage; 5-standard collimator objective; 6-CCD image collecting device; 7-main control computer; 8-precise rotating platform; The tested parallel light tube of 9-.

Embodiment

See Fig. 1, the invention provides the automatic calibration device in a kind of focal surface of collimator tube position, this device comprise standard collimator objective 5, graticule 2, pentagonal prism 3, ccd image harvester 6, high precision image planes translation stage 1, pentagonal prism scanning translation stage 4, main control computer 7 and precise rotating platform 8 form.

Tested parallel light tube 9 is arranged between graticule 2 and pentagonal prism 3; Pentagonal prism 3 is arranged at the light-emitting window place of tested parallel light tube 9; Sighting system is arranged on the emitting light path of light path after pentagonal prism 3 is transferred; Main control computer 7 controls graticule 2, the movement of pentagonal prism 3 and the image acquisition of sighting system respectively.

For the ease of the accurate control of main control computer 7 pairs of graticules 2, pentagonal prism 3 and sighting system, the automatic calibration device in focal surface of collimator tube position provided by the present invention also comprises the mobile platform be connected with main control computer 7; Main control computer 7 controls the movement of graticule 2, pentagonal prism 3 respectively by mobile platform.

Mobile platform comprises image planes translation stage 1, pentagonal prism scanning translation stage 4 and precise rotating platform 8; Graticule 2 is placed on image planes translation stage 1; Pentagonal prism 3 is placed on pentagonal prism scanning translation stage 4; Sighting system is placed on precise rotating platform 8; Main control computer 7 scans translation stage 4 with image planes translation stage 1, pentagonal prism respectively and sighting system is connected.

Sighting system comprises standard collimator objective 5 and ccd image harvester 6; Standard collimator objective 5 and ccd image harvester 6 are set in turn on the emitting light path of light path after pentagonal prism 3 is transferred.

Specific works mode of the present invention is:

(1) open tested parallel light tube 9 automatic light source and illuminate the differentiation plate 2 being equipped on image planes translation stage 1;

(2) pentagonal prism is scanned before translation stage 4 is placed in the light-emitting window of tested parallel light tube 9, and pentagonal prism 3 is fixed on the objective table of pentagonal prism scanning translation stage 4;

(3) sighting system be made up of standard collimator objective 5 and ccd image harvester 6 is installed on precise rotating platform 8, makes standard collimator objective 5 be placed in the spindle central of precise rotating platform 8;

(4) drive pentagonal prism 3 in the full clear aperture interscan of tested parallel light tube 9 by pentagonal prism scanning translation stage 4, adjustment pentagonal prism scanning translation stage 4, the light after pentagonal prism 3 is turned back is made to scan in moving process at pentagonal prism scanning translation stage 4, all received by the sighting system that standard collimator objective 5 and ccd image harvester 6 form, differentiation plate 2 turns to through tested parallel light tube, pentagonal prism, standard collimator objective images in ccd image harvester 6;

(5) when the differentiation current location of plate 2 differs larger with the desirable image planes position of tested parallel light tube 9, pentagonal prism scanning translation stage 4 drives pentagonal prism 3 to scan movement among a small circle in the bright dipping aperture of tested parallel light tube 9, by the interpretation of ccd image harvester 6 Real-time Collection, determine the moving direction breaking up picture, can be determined now to break up the position of plate 2 and the relation of desirable position of focal plane by the direction of scanning of pentagonal prism 3 and the moving direction of graticule picture, thus determine the moving direction breaking up plate 2.

(6) moving direction determined by step 5 moves differentiation plate 2 by image planes translation stage 1 with little step-length, repeat step (5), until move in the full bright dipping aperture interscan of tested parallel light tube, the lateral attitude amount of movement of graticule picture is minimum, now break up the current location of plate 2 and the desirable image planes position consistency of tested parallel light tube 9, the calibration of tested focal surface of collimator tube position is complete.The beam collimation of tested parallel light tube is provided by the lateral attitude amount of movement of graticule picture and the ratio of standard collimator objective 5 focal length;

(7) main control computer 7 control precise rotating platform 8 rotate respective angles, ccd image harvester 6 gather aim at known live width differentiation plate on line pair, by precision angle method, demarcate the focal length of tested parallel light tube 9.

Claims (2)

1. a Calibration Method for the automatic calibration device in focal surface of collimator tube position, the automatic calibration device in described focal surface of collimator tube position comprises graticule, pentagonal prism, sighting system and main control computer; Tested parallel light tube is arranged between graticule and pentagonal prism; Described pentagonal prism is arranged at the light-emitting window place of tested parallel light tube; Described sighting system is arranged on the emitting light path of light path after pentagonal prism turnover; Described main control computer controls the movement of graticule and pentagonal prism respectively and controls the image data acquiring of sighting system;
The automatic calibration device in described focal surface of collimator tube position also comprises the mobile platform be connected with main control computer; Described main control computer controls the movement of graticule and pentagonal prism respectively by mobile platform;
Described mobile platform comprises image planes translation stage, and described graticule is placed on image planes translation stage; Described main control computer is connected with image planes translation stage;
Described mobile platform also comprises pentagonal prism scanning translation stage, and described pentagonal prism is placed on pentagonal prism scanning translation stage; Described main control computer and pentagonal prism scan translation stage and are connected;
Described mobile platform also comprises precise rotating platform; Described sighting system is placed on precise rotating platform; Described main control computer is connected with sighting system;
Described sighting system comprises standard collimator objective and ccd image harvester; Described standard collimator objective and ccd image harvester are set in turn on the emitting light path of light path after pentagonal prism turnover;
It is characterized in that: said method comprising the steps of:
1) open tested parallel light tube automatic light source, illuminate the graticule being equipped on image planes translation stage;
2) pentagonal prism is scanned before translation stage is placed in the light-emitting window of tested parallel light tube, and pentagonal prism is fixed on the objective table of pentagonal prism scanning translation stage;
3) be installed on precise rotating platform by the sighting system be made up of standard collimator objective and ccd image harvester, the standard collimator objective of making is placed in the spindle central of precise rotating platform;
4) drive pentagonal prism in the full clear aperture interscan of tested parallel light tube by pentagonal prism scanning translation stage, adjustment pentagonal prism scanning translation stage, make the light after pentagonal prism is turned back in pentagonal prism scanning translation stage scanning moving process, all received by the sighting system of standard collimator objective and ccd image harvester composition;
5) when the current location of graticule differs larger with the desirable image planes position of tested parallel light tube, pentagonal prism scanning translation stage drives pentagonal prism to scan movement among a small circle in the bright dipping aperture of tested parallel light tube, by the interpretation of ccd image harvester Real-time Collection, determine the moving direction of graticule picture, the position of now graticule and the relation of desirable position of focal plane can be determined by the direction of scanning of pentagonal prism and the moving direction of graticule picture, determine the moving direction of graticule;
6) by step 5) moving direction determined moves graticule by image planes translation stage with little step-length, repeat step 5), until move in the full bright dipping aperture interscan of tested parallel light tube, the lateral attitude amount of movement of graticule picture is minimum, the now current location of graticule and the desirable image planes position consistency of tested parallel light tube, the calibration of tested focal surface of collimator tube position is complete.
2. method according to claim 1, is characterized in that: described step 6) also comprise afterwards:
7) main control computer controls precise rotating platform rotation; The line pair of known live width on graticule is aimed in the collection of ccd image harvester, records the angle that now turntable is corresponding, by precision angle method, demarcates the focal length of tested parallel light tube.
CN201310390086.9A 2013-08-30 2013-08-30 The automatic calibration device in focal surface of collimator tube position and Calibration Method CN103439089B (en)

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CN104501831A (en) * 2014-12-01 2015-04-08 北京振兴计量测试研究所 Assembly and rectification method for collimator
CN104406546B (en) * 2014-12-03 2017-04-05 成都姜业光电科技有限公司 The method that Reference Transforming is realized using removable graticle
CN106767907B (en) * 2016-11-29 2019-11-08 上海卫星工程研究所 Optical camera geometry imaging model high-precision calibrating and assessment device and method
CN107314889A (en) * 2017-08-07 2017-11-03 中山依瓦塔光学有限公司 Become the display precise parallel light tube as simulated range
CN107941472A (en) * 2017-11-24 2018-04-20 中山依瓦塔光学有限公司 Rotatable auto-focusing parallel light tube
CN108152013B (en) * 2017-12-28 2019-08-16 西安应用光学研究所 Electro-optical system pointing accuracy measuring device optical path adjusting process

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