CN105092212A - Array corner reflector pointing accuracy measurement system and method - Google Patents
Array corner reflector pointing accuracy measurement system and method Download PDFInfo
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Abstract
The invention relates to a system and a method for measuring the pointing accuracy of an array corner reflector, which comprises a light source, a star point plate, a collimator, a semi-transparent semi-reflective plane mirror, a beam shrinking lens, an optical filter, a CCD camera and a PC (personal computer). The method solves the technical problems of complex measurement process and low measurement efficiency of the existing method for measuring the pointing accuracy of the pyramid prism of the array corner reflector, can directly measure the pointing accuracy of the sub-pyramid of the large-caliber array corner reflector, does not need to carry out data splicing and interpretation for many times, and reduces errors caused by the measurement for many times.
Description
Technical field
The invention belongs to array corner reflector field, particularly relate to array corner reflector pointing accuracy measuring system and measuring method.
Background technology
The principle of work of prism of corner cube: enter a branch of directional light from a diagonal plane of prism of corner cube, through the internal reflection of other three diagonal planes, then from this diagonal plane outgoing, is mainly used in accurate fields of measurement.
According to designing requirement and actual application, array corner reflector has been applied to space flight and military every field.Array corner reflector is many due to prism of corner cube quantity, requires that the pointing accuracy deviation of each prism of corner cube and intermediate angle cone prism is less than 10 ".The prism of corner cube larger to pointing accuracy deviation corrects in time, ensures the demand meeting design objective.
The prism of corner cube pointing accuracy method of inspection of existing array corner reflector, transit is used to utilize autocollimation method to test, although the measurement of low requirement also can be realized, but also there is following defect: 1, transit visual field is little, clear aperture is little, take multiple measurements, and then the result of repetitive measurement is contrasted, the deviation size of interpretation pointing accuracy, measuring process is complicated.
2, the operating distance of transit will be rectificated, and it is more weak that the cross that often autocollimatic is returned breaks up plate picture, and energy is low, judges that pyramid pointing accuracy application condition is large.
3, large according to human eye interpretation pointing accuracy application condition, different people's reading error is different.
Summary of the invention
In order to the prism of corner cube pointing accuracy measuring method solving existing array corner reflector exists measuring process complexity, measures inefficient technical matters, the invention provides a kind of array corner reflector pointing accuracy measuring system and method.
Technical solution of the present invention:
Array corner reflector pointing accuracy measuring system, its special character is: comprise light source, star tester, parallel light tube, semi-transparent semi-reflecting level crossing, beam-shrinked mirror head, optical filter, CCD camera and PC,
Described light source sends directional light through star tester, parallel light tube, the semi-transparent semi-reflecting level crossing of directional light vertical incidence, array corner reflector to be measured is positioned on the reflected light path of semi-transparent semi-reflecting level crossing, the transmitted light path of semi-transparent semi-reflecting level crossing is placed with successively beam-shrinked mirror head, optical filter and CCD assembly, described CCD assembly is connected with PC.
Above-mentioned light source is incandescent lamp.
Above-mentioned star tester is placed on the position of focal plane of parallel light tube.
The center-hole diameter of above-mentioned star tester is 0.01mm-0.05mm.
Above-mentioned semi-transparent semi-reflecting level crossing be 45 ° with the angle of surface level.
Array corner reflector pointing accuracy measuring method, its special character is: comprise the following steps:
1) array corner reflector pointing accuracy measuring system according to claim 1 is built;
2) light source produces directional light, incident semi-transparent semi-reflecting level crossing through star tester and parallel light tube;
3) through semi-transparent semi-reflecting flat mirror reflects extremely array corner reflector to be measured, array corner reflector to be measured receives asterism picture;
4) array corner reflector to be measured enters beam-shrinked mirror head through semi-transparent semi-reflecting level crossing after being reflected by asterism picture, and then mating plate focuses on the target surface of CCD assembly after filtration;
5) by the asterism of the different corner reflector reflection of the screen viewing of PC as image space, measure pointing accuracy:
If the picture that PC screen becomes is an asterism picture, then the sensing of the corner reflector that array corner reflector is all is consistent;
If the picture that PC screen becomes is multiple asterism picture, then the sensing of the corner reflector that array corner reflector is all is inconsistent.
Above-mentioned steps 1) in build system semi-transparent semi-reflecting level crossing be in 45° angle position, concrete defining method comprise the following steps into:
A utilizes pentaprism principle of work to set up position angle 90 ° of benchmark of the first transit 9 and the second transit 10:
First transit 9 is placed on the plane of incidence position of pentaprism, second transit 10 is placed on pentaprism exit facet position, the image planes cross-graduation plate of the second transit 10 is observed by the cross-graduation plate of the first transit 9, ensure that two graticule cross searching overlap, set up 90 ° of benchmark of two transits;
B determines semi-transparent semi-reflecting mirror position:
Pentaprism in step a is replaced by semi-transparent semi-reflecting level crossing, the cross-graduation plate of the second transit 10 is observed by the first transit 9, semi-transparent semi-reflecting level crossing, adjust semi-transparent semi-reflecting mirror position, until the cross-graduation plate center superposition of two transits, now the position of semi-transparent semi-reflecting level crossing 45 ° is determined.
Above-mentioned steps 1) in build system array corner reflector position to be measured determine to comprise the following steps into:
Array corner reflector to be measured is placed in the position of the first transit 9 in above-mentioned steps b, adjust the position of array corner reflector to be measured, until the cross differentiation plate cross searching observing autocollimation picture that array corner reflector reflects and the second transit 10 on the second transit 10 overlaps, the position of array corner reflector is determined.
Above-mentioned steps 1) in build system parallel light tube location determining method comprise the following steps into:
First, parallel light tube is placed on the reflected light path vertical with array corner reflector to be measured of semi-transparent semi-reflecting level crossing, and in the rear end of parallel light tube, auto-collimator is installed;
Then, observed the autocollimation cross picture reflected by semi-transparent semi-reflecting level crossing and array corner reflector to be measured by auto-collimator, ensure that autocollimation is determined as overlap the completely position of parallel light tube of the differentiation cross picture of cross picture and auto-collimator.
The advantage that the present invention has:
1, present system directly can be measured the sub-pyramid pointing accuracy of wide aperture array corner reflector, does not need to carry out repeatedly data splicing and interpretation, reduces the error that repetitive measurement brings.
2, the measurement of the sub-pyramid pointing accuracy of pair array corner reflector of the present invention, through software data process, reduce the error that artificial origin causes, measuring accuracy is high.
Accompanying drawing explanation
Fig. 1 is array corner reflector pointing accuracy measuring system structural representation of the present invention;
Fig. 2 is optical schematic diagram of the present invention;
Fig. 3-Fig. 4 is the process schematic that the present invention determines semi-transparent semi-reflecting level crossing;
Fig. 5 is the process schematic that the present invention determines array corner reflector to be measured;
Fig. 6 is the process schematic of determination parallel light tube of the present invention;
Fig. 7 is the process schematic of determination star tester of the present invention;
Fig. 8 is the process schematic of determination beam-shrinked mirror head of the present invention;
Wherein Reference numeral is: 1-array corner reflector to be measured, the semi-transparent semi-reflecting level crossing of 2-, 3-light source, 4-star tester, 5-parallel light tube, 6-optical filter, 7-CCD assembly, 8-PC machine, 9-first transit, 10-second transit, 11-pentaprism, 12-auto-collimator, 13-beam-shrinked mirror head.
Embodiment
Embodiment 1:
As shown in Figure 1, the structural representation of array corner reflector pointing accuracy measuring system, comprise light source 3, star tester 4, parallel light tube 5, semi-transparent semi-reflecting level crossing 2, beam-shrinked mirror head 13, optical filter 6, CCD camera 7 and PC 8, light source sends directional light through star tester, parallel light tube, the semi-transparent semi-reflecting level crossing of directional light vertical incidence, array corner reflector 1 to be measured is positioned on the reflected light path of semi-transparent semi-reflecting level crossing, the transmitted light path of semi-transparent semi-reflecting level crossing is placed with successively beam-shrinked mirror head, optical filter and CCD assembly, CCD assembly is connected with PC.
Star tester 3 is through parallel light tube outgoing parallel light path, directional light is refracted to by semi-transparent semi-reflecting level crossing to be treated on angle measurement array reflector, array corner reflector to be measured measures beam-shrinked mirror head by entering through semi-transparent semi-reflecting level crossing after the asterism picture received reflection, then mating plate (mainly in order to the power of control CCD assembly Received signal strength) focuses on the target surface of CCD assembly after filtration, the asterism reflected by the different corner reflector of the screen viewing of PC is as image space, if the sensing of all corner reflectors is consistent, the picture that PC screen becomes will become an asterism picture, a lot of asterism picture is just formed if inconsistent.
Star tester is placed on the position of focal plane of light pipe, is the annex of parallel light tube.Light forms a hot spot through the center pit of star tester, and then hot spot just forms a target source on the position of focal plane of parallel light tube)
By the position relationship of adjustment array corner reflector prism of corner cube, control asterism picture on screen, be presented at the object reaching detection arrays corner reflector pointing accuracy within certain region.
Embodiment 2: build array corner reflector pointing accuracy measuring system process:
One, semi-transparent semi-reflecting level crossing 45° angle position is determined:
1, pentaprism 11 principle of work is utilized to set up position angle 90 ° of benchmark of the first transit 9 and the second transit 10:
Pentaprism 11 is placed by position shown in Fig. 3, then the first transit 9 is placed on the front end face (plane of incidence bore) of pentaprism 11, second transit 10 is placed on pentaprism 11 exit facet position, the image planes cross-graduation plate of the second transit 10 is observed by the cross-graduation plate of the first transit 9, ensure that two graticule cross searching overlap, set up 90 ° of benchmark of two transits.
2, semi-transparent semi-reflecting mirror position is determined: after determining the relative position of two transits, pentaprism 11 is replaced by semi-transparent semi-reflecting level crossing 2 (position as shown in Figure 4), the cross-graduation plate of the second transit 10 is observed by the first transit 9, semi-transparent semi-reflecting level crossing 2, adjust the position of semi-transparent semi-reflecting level crossing 2, until the differentiation cross searching of two transits overlaps, the position of semi-transparent semi-reflecting level crossing 45 ° just can be determined
Two, the position of array corner reflector is determined: after determining semi-transparent semi-reflecting level crossing 2 position, the first transit 9 is replaced by array corner reflector 1 to be measured, as shown in Figure 5.The position of adjustment corner reflector, until the cross differentiation plate cross searching observing autocollimation picture that array corner reflector to be measured reflects and the second transit 10 on the second transit 10 overlaps, the position of array corner reflector to be measured is determined.
Three, the position of parallel light tube is determined
After determining array corner reflector position to be measured, parallel light tube 5 is placed position as shown in Figure 6, and auto-collimator 12 is arranged on parallel light tube 5 rear end face, the autocollimation cross picture reflected by semi-transparent semi-reflecting level crossing and array corner reflector to be measured is observed by auto-collimator 12, ensure that two autocollimations overlap completely as the differentiation cross picture of cross picture and auto-collimator, the position of parallel light tube can be determined.
Four, the position of star tester is determined: after determining the position of parallel light tube, auto-collimator 12 is taken off, then auto-collimator 12 is disassembled from parallel light tube, then star tester (asterism bore dia 0.05mm) is placed on the position of focal plane of parallel light tube, the incandescent lamp of 100W is placed as light source, as shown in Figure 7 at the rear end face of light pipe.
Five, beam-shrinked mirror head 13 is placed position as shown in Figure 8, ensure that the bore of array corner reflector to be measured is full of beam-shrinked mirror draught animals footpath.Optical filtering blade and CCD assembly are overlapped in systems in which.
The system of whole like this detection arrays corner reflection prism of corner cube pointing accuracy has overlapped.
Embodiment 3:
Array corner reflector pointing accuracy measuring method, comprises the following steps:
1) array corner reflector pointing accuracy measuring system is built;
2) light source produces directional light, incident semi-transparent semi-reflecting level crossing through star tester and parallel light tube;
3) through semi-transparent semi-reflecting flat mirror reflects extremely array corner reflector to be measured, array corner reflector to be measured receives asterism picture;
4) array corner reflector to be measured enters beam-shrinked mirror head through semi-transparent semi-reflecting level crossing after being reflected by asterism picture, and then mating plate focuses on the target surface of CCD assembly after filtration;
5) by the asterism of the different corner reflector reflection of the screen viewing of PC as image space, measure pointing accuracy:
If the picture that PC screen becomes is an asterism picture, then the sensing of the corner reflector that array corner reflector is all is consistent;
If the picture that PC screen becomes is multiple asterism picture, then the sensing of the corner reflector that array corner reflector is all is inconsistent.
Claims (9)
1. array corner reflector pointing accuracy measuring system, is characterized in that: comprise light source, star tester, parallel light tube, semi-transparent semi-reflecting level crossing, beam-shrinked mirror head, optical filter, CCD camera and PC,
Described light source sends directional light through star tester, parallel light tube, the semi-transparent semi-reflecting level crossing of directional light vertical incidence, array corner reflector to be measured is positioned on the reflected light path of semi-transparent semi-reflecting level crossing, the transmitted light path of semi-transparent semi-reflecting level crossing is placed with successively beam-shrinked mirror head, optical filter and CCD assembly, described CCD assembly is connected with PC.
2. array corner reflector pointing accuracy measuring system according to claim 1, is characterized in that: described light source is incandescent lamp.
3. array corner reflector pointing accuracy measuring system according to claim 2, is characterized in that: described star tester is placed on the position of focal plane of parallel light tube.
4. array corner reflector pointing accuracy measuring system according to claim 3, is characterized in that: the center-hole diameter of described star tester is 0.01mm-0.05mm.
5., according to the arbitrary described array corner reflector pointing accuracy measuring system of claim 1-4, it is characterized in that: described semi-transparent semi-reflecting level crossing be 45 ° with the angle of surface level.
6. array corner reflector pointing accuracy measuring method, is characterized in that: comprise the following steps:
1) array corner reflector pointing accuracy measuring system according to claim 1 is built;
2) light source produces directional light, incident semi-transparent semi-reflecting level crossing through star tester and parallel light tube;
3) through semi-transparent semi-reflecting flat mirror reflects extremely array corner reflector to be measured, array corner reflector to be measured receives asterism picture;
4) array corner reflector to be measured enters beam-shrinked mirror head through semi-transparent semi-reflecting level crossing after being reflected by asterism picture, and then mating plate focuses on the target surface of CCD assembly after filtration;
5) by the asterism of the different corner reflector reflection of the screen viewing of PC as image space, measure pointing accuracy:
If the picture that PC screen becomes is an asterism picture, then the sensing of the corner reflector that array corner reflector is all is consistent;
If the picture that PC screen becomes is multiple asterism picture, then the sensing of the corner reflector that array corner reflector is all is inconsistent.
7. array corner reflector pointing accuracy measuring method according to claim 6, is characterized in that: step 1) in build system semi-transparent semi-reflecting level crossing be in 45° angle position, concrete defining method comprise the following steps into:
A utilizes pentaprism principle of work to set up position angle 90 ° of benchmark of the first transit and the second transit:
First transit is placed on the plane of incidence position of pentaprism, second transit is placed on pentaprism exit facet position, the image planes cross-graduation plate of the second transit is observed by the cross-graduation plate of the first transit, ensure that two graticule cross searching overlap, set up 90 ° of benchmark of two transits;
B determines semi-transparent semi-reflecting mirror position:
Pentaprism in step a is replaced by semi-transparent semi-reflecting level crossing, the cross-graduation plate of the second transit is observed by the first transit, semi-transparent semi-reflecting level crossing, adjust semi-transparent semi-reflecting mirror position, until the cross-graduation plate center superposition of two transits, now the position of semi-transparent semi-reflecting level crossing 45 ° is determined.
8. the array corner reflector pointing accuracy measuring method according to claim 6 or 8, is characterized in that: step 1) in build system array corner reflector position to be measured determine to comprise the following steps into:
Array corner reflector to be measured is placed in the position of the first transit in above-mentioned steps b, adjust the position of array corner reflector to be measured, until the cross differentiation plate cross searching observing autocollimation picture that array corner reflector reflects and the second transit on the second transit overlaps, the position of array corner reflector is determined.
9. array corner reflector pointing accuracy measuring method according to claim 8, is characterized in that: step 1) in build system parallel light tube location determining method comprise the following steps into:
First, parallel light tube is placed on the reflected light path vertical with array corner reflector to be measured of semi-transparent semi-reflecting level crossing, and in the rear end of parallel light tube, auto-collimator is installed;
Then, observed the autocollimation cross picture reflected by semi-transparent semi-reflecting level crossing and array corner reflector to be measured by auto-collimator, ensure that autocollimation is determined as overlap the completely position of parallel light tube of the differentiation cross picture of cross picture and auto-collimator.
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| CN109682398A (en) * | 2018-12-25 | 2019-04-26 | 中国科学院长春光学精密机械与物理研究所 | Tridimensional mapping camera complete machine elements of interior orientation calibrating method, apparatus and system |
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