CN201540198U - Testing device for diffuse spot and color deviation of optical system - Google Patents
Testing device for diffuse spot and color deviation of optical system Download PDFInfo
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- CN201540198U CN201540198U CN200920245045XU CN200920245045U CN201540198U CN 201540198 U CN201540198 U CN 201540198U CN 200920245045X U CN200920245045X U CN 200920245045XU CN 200920245045 U CN200920245045 U CN 200920245045U CN 201540198 U CN201540198 U CN 201540198U
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Abstract
The utility model relates to a testing device for the diffuse spot and color deviation of an optical system, which comprises a monochromator, a target wheel, a collimator, a turntable, a CCD micro-measuring unit and a collecting and controlling computer; the monochromator, the target wheel, the collimator and the CCD micro-measurement unit are sequentially positioned on the same optical axis; the rotary table is used for arranging the optical system to be measured and the CCD microscopic measuring unit; the rotary table, the monochromator and the CCD microscopic measuring unit are all connected with a collecting and controlling computer. The utility model discloses can the various optical system of effectual test diffuse spot diameter and the colour deviation under different wavelength ranges, fine assurance optical system's imaging quality.
Description
Technical field
The utility model relates to the proving installation of a kind of optical system disc of confusion and colo(u)r bias.
Background technology
The CCD star sensor belongs to the high-precision optical sensor, is with the attitude sensor of fixed star as measuring basis, information accurately is provided mainly for the flight attitude and the position of spacecraft.Its ultimate principle be by optical system with the some fixed star imaging in the moment visual field on the CCD photosurface, carry out match through Flame Image Process and star catalogue, finish identification, and then can determine the sensing of current time sensor optical axis under inertial coordinates system fixed star in the visual field.Attitude measurement is that the measurement by angular distance between fixed star realizes, and astrology center calculation precision directly influences the measurement of angular distance, this shows the importance of quality in attitude measurement of the astrology, therefore say that the quality of optical system not only directly influences the measuring accuracy of star sensor, and be related to whole star sensor can operate as normal.The ordinary optical system all requires the some diffusion diameter on the face of resembling the smaller the better, and the star sensor optical system is different with optical system in requirement on matter, in order correctly to identify the accurate position of celestial body and judgement satellite, its celestial body center of gravity bearing accuracy height in the field range of will demanding perfection, promptly some diffusion diameter of a circle is distributed in a specific scope on the face of resembling, the center of gravity deviate is also little in spectral range simultaneously, what therefore optical system must be proofreaied and correct is owing to the asymmetric aberration that causes of picture point energy dispersal, promptly causes the picture point off-centring to lose symmetrical distortion and coma (changing with the visual field is different) with how much.Generally speaking, this aberration correction is arrived suitable decimal magnitude during design of Optical System, but influence through processing, assembling and material itself, actual optical system aberration results and design load have very big discrepancy, this just need carry out quantitative measurement to the disc of confusion diameter and the colo(u)r bias of the different visual fields of optical system, different wave length, judges whether it satisfies the required matter requirement that resembles.For the such sensor that will reach rad level measuring accuracy of star sensor, the error that optical system is brought, account in its total error quite most of, thereby limited the further raising of sensor precision, raising day by day along with attitude of satellite control requirement, accuracy requirement to star sensor will be higher, and its service band by visible light gradually to the development of ultraviolet and near-infrared band, therefore traditional professional measures the star sensor Performance of Optical System by the eyes visualization and can not meet the demands far away.
Traditional optical system disc of confusion test philosophy is referring to Fig. 1, tested optical system 104 is fixed on the optical bench turntable 103, add optical filter 101 before the light source 100, illuminate the asterism on parallel light tube 102 focal planes, utilize the parallel light tube 102 of optical bench to form the infinite distance target, with the human eye is receiver, adopts reading microscope 105 to observe the disc of confusion shape and measure the disc of confusion diameter at tested optical system image planes place.There is following shortcoming in this method:
1, measuring accuracy is low.Owing to utilize human eye to observe, the just distribution of geometric configuration that human eye is seen, rather than energy distributions, the disc of confusion distribution situation that can not reflect tested optical system really, simultaneously because the difference between the individuality causes pointing error big, disc of confusion size measuring precision can only roughly be judged the scope of colour cast difference about 10 μ m, can not accurately record the colour cast difference.
2, Installation and Debugging work complexity, testing efficiency is low.Because what optical bench used is the halogen tungsten lamp light source, if expect that the disc of confusion of monochromatic wavelength must add interference filter before light source, make that like this energy that receives reduces greatly, and because the transmitance difference of different optical filters, cause energy inhomogeneous, satisfy the best image planes of measuring needs and be not easy to find, adjustment process wastes time and energy;
3, limited by the human eye luminosity function, the spectral range of tested optical system can only be limited in the visible-range.
The utility model content
In order to solve existing technical matters in the background technology, the utility model proposes a kind of CCD of utilization micrometering unit and measure the device of optical system disc of confusion and colo(u)r bias automatically, and the algorithm of optical system disc of confusion and colo(u)r bias interpretation proposed, and this device can effectively be tested disc of confusion diameter and the colo(u)r bias of various optical systems under different wavelength range, has well guaranteed the image quality of optical system.
Technical solution of the present utility model is: the proving installation of a kind of optical system disc of confusion and colo(u)r bias, this device comprise monochromator, target wheel, parallel light tube, turntable, CCD micrometering unit and collection and control computer; Described monochromator, target wheel, parallel light tube and CCD micrometering unit are positioned on the same optical axis successively; Described turntable is used to be provided with tested optical system and CCD micrometering unit; Described turntable, monochromator and CCD micrometering unit all are connected with control computer with collection.
Above-mentioned CCD micrometering unit is by microcobjective, ccd detector, and two-dimension displacement platform and controller are formed; Microcobjective is connected by lens barrel with ccd detector and is arranged on the two-dimension displacement platform; The two-dimension displacement platform is connected in controller.
Above-mentioned proving installation also comprises target controller, described target controller linking objective target wheel and collection and control computer.
Above-mentioned proving installation also comprises mobile control box, and described mobile control box is connected with turntable with CCD micrometering unit respectively.
Above-mentioned parallel light tube is a total-reflection type, and described turntable is the digital display turntable of electronic control, and described turntable is provided with guide rail.
The utility model has the advantages that:
1, measuring accuracy height.The optical system of CCD micrometering unit, adopt the design of flat field apochromatism, have excellent image quality and higher enlargement ratio, the target picture amplifies the back in the imaging of CCD target surface through microcobjective, image processing software cooperates corresponding algorithm, make the disc of confusion measuring accuracy can reach 0.5 μ m, the colo(u)r bias measuring accuracy can reach 0.3 μ m.
2, work out high-precision image interpretation software: the disc of confusion interpretation method adopts image pre-service synthetic technology, with the image adaptive background processing in advance of gathering, energy distribution according to Rayleigh criterion requires to extract the distribution of target ideal capacity, and the energy range that comprises according to concrete disc of confusion requires to determine its theoretical disc of confusion size, as radius at the image upper drawing circle, and with this image synthetic with former figure again (when synthesizing the center of disc of confusion among two width of cloth figure is overlapped) formation disc of confusion energy composite diagram, according to composite diagram disc of confusion radius, carry out the measurement of real image disc of confusion diameter and handle the disc of confusion diameter that obtains requiring.Because the image disc of confusion size that measures of ccd detector is to be unit of measurement with the ccd detector pixel dimension, in order to improve measuring accuracy, in the Flame Image Process pixel has been taked inferior pixel subdivide technology in this algorithm.
3, test automation degree, efficient height.Aim at by human eye in the classic method, not only pointing accuracy is low, and comparatively wastes time and energy, 3 personnel of minimum needs of survey time time spent 2-3 hour.In the new method, replaced human eye with CCD micrometering unit, can adjust real-time and easily, improved efficiency of measurement greatly, a survey time needs 2 30 minutes personnel's times spent at most.
4, spectral measurement ranges is wide.The utility model can be measured tested optical system disc of confusion energy distribution situation truly, adopts CCD as receiver, satisfies the needs of optical system practical application, can realize full spectral coverage measurement.
5, convenient data processing is quick.Worked out high debugging and the test analysis process software of automaticity, the valid data that produce in the test process can both be handled in real time and be stored in the computing machine, have also preserved original image simultaneously, are convenient to follow-up processing and analysis.
6, real-time is good, expanded function is strong.The utility model is simple in structure, and convenient many people observe whole test processs simultaneously, not only can carry out high precision measurement to disc of confusion, the colo(u)r bias of optical system, and can measure in real time the focal length of tested optical system, distortion, image quality etc.
Description of drawings
Fig. 1 is the prior art constructions synoptic diagram;
Fig. 2 is a structural representation of the present utility model.
Embodiment
Referring to Fig. 2, sensor optical system disc of confusion that the utility model provides and colo(u)r bias proving installation comprise monochromator 1, target wheel 2, target controller 3, parallel light tube 4, tested optical system 5, two-dimensional CCD micrometering unit 6, digital display turntable 7, controller 8, collection and control computer 9, damped platform 10; The spectral range of monochromator 1 requires to cover the spectral range of tested optical system; Monochromator 1 illuminates object element by computer control; Target wheel 2 and target controller 3 are formed an object element,, target wheel 2 is on a disk a plurality of Target Boards to be housed simultaneously, it rotates by target controller 3 controls, is mainly used in the asterism target that different sizes are provided; Target wheel 2 is connected in target controller 3, and target controller 3 is connected with control computer 9 with collection; Parallel light tube 4 is a total-reflection type, and desirable infinite distance target can be provided; Digital display turntable 7 is electronic control, and turntable is provided with guide rail, and two-dimensional CCD micrometering unit 6 can move on guide rail; Digital display turntable 7 is connected in to be gathered and control computer 9, can show in real time, is used to provide the position angle of the different visual fields of tested optical system; Two-dimensional CCD micrometering unit 6 is made up of different microcobjectives, ccd detector, two-dimension displacement platform and controller 8, and microcobjective is connected by lens barrel with ccd detector and is arranged on the two-dimension displacement platform; The two-dimension displacement platform is connected in controller 8; The microcobjective of microcobjective with high imaging quality, different enlargement ratios, ccd detector is that wide spectral response range and response linearity are good; The two-dimension displacement platform will have good line of motion, verticality; Two-dimensional CCD micrometering unit is mainly used in the size of the different visual fields of the tested optical system of measurement asterism disc of confusion and the position of colo(u)r bias.The existing controller that can controlled target moves can be as the target controller in the utility model 3; Two-dimension displacement platform in the two-dimensional CCD micrometering unit 6 and controller 8 can be existing structure and the two-dimentional controllers 8 that moves of control that can realize that two dimension moves.
Sensor optical system disc of confusion that the utility model provides and colo(u)r bias proving installation, the target picture amplifies the back in the imaging of CCD target surface through microcobjective, image processing software cooperates corresponding algorithm, makes the disc of confusion measuring accuracy can reach 0.5 μ m, and the colo(u)r bias measuring accuracy can reach 0.3 μ m.The disc of confusion interpretation method adopts image pre-service synthetic technology, with the image adaptive background processing in advance of gathering, energy distribution according to Rayleigh criterion requires to extract the distribution of target ideal capacity, and the energy range that comprises according to concrete disc of confusion requires to determine its theoretical disc of confusion size, as radius at the image upper drawing circle, and with this image synthetic with former figure again (when synthesizing the center of disc of confusion among two width of cloth figure is overlapped) formation disc of confusion energy composite diagram, according to composite diagram disc of confusion radius, carry out the measurement of real image disc of confusion diameter and handle the disc of confusion diameter that obtains requiring.Because the image disc of confusion size that measures of ccd detector is to be unit of measurement with the ccd detector pixel dimension, in order to improve measuring accuracy, in the Flame Image Process pixel has been taked inferior pixel subdivide technology in this algorithm.Replace human eye with CCD micrometering unit, can adjust real-time and easily, and can many people observe simultaneously, a survey time needs improved efficiency of measurement greatly 2 30 minutes personnel's times spent at most.The utility model truly bound copy of a document kept on file measures tested optical system disc of confusion energy distribution situation, adopts CCD as receiver, satisfies the needs of optical system practical application, can realize full spectral coverage measurement; In addition, worked out high debugging and the test analysis process software of automaticity, the valid data that produce in the test process can both be handled in real time and be stored in the computing machine, have also preserved original image simultaneously, are convenient to follow-up processing and analysis.
Claims (5)
1. the proving installation of optical system disc of confusion and colo(u)r bias, it is characterized in that: this device comprises monochromator, target wheel, parallel light tube, turntable, CCD micrometering unit and collection and control computer; Described monochromator, target wheel, parallel light tube and CCD micrometering unit are positioned on the same optical axis successively; Described turntable is used to be provided with tested optical system and CCD micrometering unit; Described turntable, monochromator and CCD micrometering unit all are connected with control computer with collection.
2. the proving installation of optical system disc of confusion according to claim 1 and colo(u)r bias is characterized in that: described CCD micrometering unit is by microcobjective, ccd detector, and two-dimension displacement platform and controller are formed; Microcobjective is connected by lens barrel with ccd detector and is arranged on the two-dimension displacement platform; The two-dimension displacement platform is connected in controller.
3. the proving installation of optical system disc of confusion according to claim 1 and 2 and colo(u)r bias is characterized in that: described proving installation also comprises target controller, described target controller linking objective target wheel and collection and control computer.
4. the proving installation of optical system disc of confusion according to claim 1 and 2 and colo(u)r bias is characterized in that: described proving installation also comprises mobile control box, and described mobile control box is connected with turntable with CCD micrometering unit respectively.
5. the proving installation of optical system disc of confusion according to claim 1 and colo(u)r bias is characterized in that: described parallel light tube is a total-reflection type, and described turntable is the digital display turntable of electronic control, and described turntable is provided with guide rail.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920245045XU CN201540198U (en) | 2009-10-30 | 2009-10-30 | Testing device for diffuse spot and color deviation of optical system |
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| CN200920245045XU CN201540198U (en) | 2009-10-30 | 2009-10-30 | Testing device for diffuse spot and color deviation of optical system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053010B (en) * | 2009-10-30 | 2013-07-10 | 中国科学院西安光学精密机械研究所 | Device and method for testing diffuse spot and color deviation of optical system |
| CN104198054A (en) * | 2014-08-27 | 2014-12-10 | 中国科学院上海光学精密机械研究所 | Movable high-power laser beam wavefront measuring device and measuring method thereof |
| CN112540032A (en) * | 2020-12-11 | 2021-03-23 | 中国烟草总公司郑州烟草研究院 | Novel tobacco product smoke quantity testing platform |
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2009
- 2009-10-30 CN CN200920245045XU patent/CN201540198U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053010B (en) * | 2009-10-30 | 2013-07-10 | 中国科学院西安光学精密机械研究所 | Device and method for testing diffuse spot and color deviation of optical system |
| CN104198054A (en) * | 2014-08-27 | 2014-12-10 | 中国科学院上海光学精密机械研究所 | Movable high-power laser beam wavefront measuring device and measuring method thereof |
| CN104198054B (en) * | 2014-08-27 | 2017-03-15 | 中国科学院上海光学精密机械研究所 | Packaged type high-power laser beams Wavefront measuring apparatus and its measuring method |
| CN112540032A (en) * | 2020-12-11 | 2021-03-23 | 中国烟草总公司郑州烟草研究院 | Novel tobacco product smoke quantity testing platform |
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Granted publication date: 20100804 Termination date: 20131030 |