CN202614226U - Focal plane presetting device in space camera vacuum - Google Patents
Focal plane presetting device in space camera vacuum Download PDFInfo
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- CN202614226U CN202614226U CN 201220215270 CN201220215270U CN202614226U CN 202614226 U CN202614226 U CN 202614226U CN 201220215270 CN201220215270 CN 201220215270 CN 201220215270 U CN201220215270 U CN 201220215270U CN 202614226 U CN202614226 U CN 202614226U
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- 238000012360 testing method Methods 0.000 description 9
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- 238000004088 simulation Methods 0.000 description 3
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Abstract
The utility model relates to a focal plane presetting device in space camera vacuum, which comprises a light source, a parallel light optical system, a data acquisition and processing system and a vacuum system; the data acquisition and processing system is connected with the parallel light optical system; the parallel light optical system is arranged on an emergent light path of the light source; the vacuum system is arranged on an emergent light path of the parallel optical system, and the camera to be detected is arranged on the emergent light path behind the parallel optical system and is electrically connected with the data acquisition and processing system. The utility model discloses combine the vacuum imaging principle to provide one kind can be effectual preset, can guarantee the space shuttle camera can clear formation of image in space shuttle camera vacuum after last day focal plane preset device to the space shuttle camera focal plane of space shuttle camera on ground.
Description
Technical field
The utility model belongs to optical field; Relate to focal plane presetter device in a kind of camera space vacuum; Relate in particular to a kind of camera space after launching successfully; Be used on ground presetting, guarantee behind the camera space Heaven focal plane presetter device in the vacuum of purpose that can blur-free imaging in the face of the focal plane of camera space.
Background technology
Behind present numerous space flight optics load Heaven, all exist focal plane can depart from the position that original ground is demarcated, will directly reduce its transport function like this, influence image quality.The optical system that in the development of various camera spaces, is designed all designs according to the vacuum work condition, and actual ray machine is debug and tested all and in the ground environment air, accomplishes.Yet the assembly environment on this ground working environment general with in the sky is different, and promptly camera space all can receive the influence of vacuum environment, and image planes produce vacuum out of focus phenomenon.If camera space is operated in this image planes out of focus situation, then camera can not be on high in blur-free imaging, satisfied not the needs of camera space earth observation.
Problem for camera space focal plane vacuum out of focus has two kinds of solutions, first kind at present: big through the design depth of focus, the optical system that the vacuum defocusing amount is little remedies the influence of vacuum out of focus to image quality; Second kind: control the image planes position through camera space in real time at rail, promptly adjust the focal plane front and back in real time and guarantee its blur-free imaging.Though above-mentioned two kinds of methods are widely used in actual engineering, still have a lot of defectives.Though first method is fine for long-focus camera space reliability; But for short burnt, object lens of large relative aperture camera space; Its depth of focus is too little; The defocusing amount of optical system has surpassed the tolerance range of depth of focus in a vacuum, and then the image quality to camera can produce bigger influence, and possibly can't blur-free imaging when serious.For second method, but generally when satellite carry load quality is big, be used, but for small-sized camera space, a kind of automatic focusing mechanism be installed on its focal plane, mechanism will increase the complete machine quality of camera greatly like this.For camera space, increase camera quality and guarantee that picture element is very worthless method; In addition, the arrangement of this focus adjusting mechanism is with reducing the reliability of camera space in rail work greatly.Therefore, above-mentioned two kinds of methods are badly in need of further improving.
The utility model content
In order to solve the above-mentioned technical matters that exists in the background technology, the utility model combines the vacuum image-forming principle to provide a kind of and can be effectively presets, can guarantee focal plane presetter device in the camera space vacuum of camera space ability blur-free imaging behind the Heaven in the face of the focal plane of camera space on ground.
The technical solution of the utility model is: the utility model provides focal plane presetter device in a kind of camera space vacuum, and its special character is: the focal plane presetter device comprises light source, directional light optical system, data acquisition and disposal system and vacuum system in the said camera space vacuum; Said data acquisition and disposal system link to each other with the directional light optical system; Said directional light optical system is arranged on the emitting light path of light source; Said vacuum system is arranged on the emitting light path of collimating optics system, and camera to be measured places on the emitting light path after the directional light optical system and with data acquisition and disposal system and electrically connects.
Above-mentioned directional light optical system comprises parallel light tube, is arranged on the parallel light tube target and the grating chi of parallel light tube end; Said grating chi and data acquisition and disposal system electrically connect; The emergent light of said light source passes through parallel light tube target and parallel light tube successively.
Above-mentioned vacuum system comprises vacuum tank; Said vacuum tank comprises tank body and is arranged on the light incidence window on the tank body; Said smooth incidence window is arranged on the emitting light path of directional light optical system; Camera to be measured places tank interior and is on the emitting light path of parallel light tube.
Above-mentioned smooth incidence window is a transparent glass.
The utility model has the advantages that:
1, focal plane presetter device in the camera space vacuum that the utility model provided; Utilize the geometric optical imaging principle; In conjunction with optical system focal plane out of focus phenomenon in a vacuum; Breakthrough first proposition the device that presets in the face of its focal plane on ground of a kind of camera space, solved the focal plane problem of offset correction in a vacuum; Also but expanded application is when the butt joint of all kinds of camera photoelectricity for this device, and focal plane is repaiied the accurate test of the amount of cutting, the application of this device for photoelectricity butt joint repair the accurate grinding of cutting pad in debuging, provide reliable test to guarantee; Applied range, the vacuum focal plane of containing all kinds of optical systems such as camera space medium ultraviolet, visible, infrared, transmission, reflection, refraction-reflection presets, and therefore has promotion prospect widely; The utility model is to be used for the gordian technique that presets at rail camera space focal plane, and this Study on Technology success is with indicating that domestic camera space ground calibration technology gets into a new step.Therefore, carry out the research that camera space vacuum focal plane presets, will play the promotion effect the development of China's space flight optics load.
2, focal plane presetter device in the camera space vacuum that the utility model provided; Utilize the ground environment testing equipment; The focal plane that built that a cover is simple, good reliability, measuring accuracy is high is the defocusing amount test macro in a vacuum, but its on the ground the real simulation camera space in the rail working condition; This device solves vacuum focal plane defocusing amount in the past, through the low difficult problem of software estimation precision, its actual measuring accuracy can reach ± 2 μ m, satisfies the test request that all kinds of camera space vacuum focal planes preset fully; Simultaneously; This device utilizes environmental test equipment----vacuum tank, when the camera optics picture element is tested, camera to be measured is positioned in the vacuum tank; Then it does not receive environment parasitic light and the air-flow influence that mass measurement brings to true imaging, and is especially more remarkable for the camera space of heavy caliber, long-focus.
Description of drawings
Fig. 1 is the structural representation of focal plane presetter device in the camera space vacuum that provides of the utility model;
Wherein:
The 1-vacuum tank; 2-camera focal plane to be measured; 3-camera to be measured; 4-vacuum tank window glass; The 5-parallel light tube; 6-parallel light tube target; 7-grating chi; 8-data acquisition and disposal system.
Embodiment
Referring to Fig. 1, the utility model provides focal plane presetter device in the camera space vacuum, and this device comprises light source, directional light optical system, data acquisition and disposal system 8 and vacuum system; Data acquisition and disposal system 8 link to each other with the directional light optical system; The directional light optical system is arranged on the emitting light path of light source; Vacuum system is arranged on the emitting light path of collimating optics system, and camera 3 to be measured places on the emitting light path after the directional light optical system and with data acquisition and disposal system 8 and electrically connects.
The directional light optical system comprises parallel light tube 5, is arranged on the parallel light tube target 6 and the grating chi 7 of parallel light tube 5 ends; Grating chi 7 electrically connects with data acquisition and disposal system 8; The emergent light of light source passes through parallel light tube target 6 and parallel light tube 5 successively.
Vacuum system comprises vacuum tank 1; Vacuum tank comprises tank body and is arranged on the light incidence window on the tank body; The light incidence window is arranged on the emitting light path of directional light optical system; Camera to be measured places tank interior and is on the emitting light path of parallel light tube.The light incidence window is a transparent glass.
Principle of work and content shown in Figure 1 based on the utility model; The concrete course of work of the utility model is: the parallel light tube 5 outside vacuum tank 1 transfers to optimal focal plane position (being that the parallel light tube emergent light is a directional light) with its focal plane parts; Making this moment camera 3 to be measured aim at parallel light tube 5 takes; If camera 3 captured targets to be measured satisfy request for utilization as its optical transfer function MTF, then focal plane 2 positions of camera to be measured are the optimum position that ground is demarcated at this moment.Then vacuum tank 1 is vacuumized, make the actual environment of its ability real simulation vacuum.Take 3 pairs of parallel light tube 5 targets of camera to be measured this moment once more; Constantly prolong simultaneously the position of optical axis direction front and back adjustment parallel light tube 5 focal planes; Up to the captured target of camera to be measured 3 as optical transfer function MTF with vacuumize before the optical transfer function mtf value when identical till; At this moment according to grating chi 7 readings behind the focal surface of collimator tube, utilize formula (1) can accurately calculate the amount of cutting (repairing butt) of repairing of camera focal plane to be measured 2 positions to being consistent with parallel light tube 5 focal plane moving directions.Repair cut camera focal plane 2 to be measured after; Once more camera 3 to be measured is placed in the vacuum tank 1 and to it and vacuumizes; Simultaneously parallel light tube 5 focal planes are resetted; If camera 3 to be measured is taken parallel light tube 5 targets once more, then its captured target can satisfy request for utilization as optical transfer function MTF, and the vacuum focal plane of promptly accomplishing camera 3 to be measured presets.
L in the formula
PhaseFor camera focal plane to be measured is repaiied the amount of cutting, f
PhaseBe the focal length of camera to be measured, f
LightBe the focal length of parallel light tube, l
LightDefocusing amount for parallel light tube.
Wherein the function of each several part is introduced as follows:
Vacuum tank 1 main simulation vacuum environment guarantees that camera 3 to be measured can be operated in the vacuum environment really.Camera focal plane 2 to be measured mainly is that assurance camera 3 to be measured can be regulated front and back in vacuum environment, reaches the purpose of optimal imaging to guarantee camera 3 to be measured.Camera 3 to be measured is test specimens of this test, is used to verify the feasibility of this robot scaling equipment.Vacuum tank window glass 4 mainly provides desirable optical window, guarantees that camera 3 to be measured is placed on the emergent light target that can receive parallel light tube 5 in the vacuum tank 1, and these window glass 4 requirements simultaneously do not exert an influence to the image quality of camera 3 to be measured.Parallel light tube 5 mainly provides the target of infinite distance, is used to demarcate camera 3 to be measured defocusing amount in a vacuum.Parallel light tube target 6 is used to test the transport function of camera to be measured, through the defocusing amount of adjustment target, calculates the transport function of its diverse location, the actual defocusing amount of calibrating camera focal plane 2 to be measured.Grating chi 7 is installed in parallel light tube target 6 back, is used for measuring the size of focal surface of collimator tube 6 defocusing amounts.Data acquisition and disposal system 8 are used for gathering the target image that camera 3 to be measured is taken in real time, and its transport function is handled, calculated to this image, guarantee that camera 3 to be measured is placed on vacuum tank 1 front and back transport function unanimity; Simultaneously parallel light tube 5 defocusing amounts of grating chi 7 outputs are gathered, utilize formula (1) to calculate the defocusing amount of its camera focal plane 2 to be measured.
Claims (4)
1. focal plane presetter device in the camera space vacuum, it is characterized in that: the focal plane presetter device comprises light source, directional light optical system, data acquisition and disposal system and vacuum system in the said camera space vacuum; Said data acquisition and disposal system link to each other with the directional light optical system; Said directional light optical system is arranged on the emitting light path of light source; Said vacuum system is arranged on the emitting light path of collimating optics system, and camera to be measured places on the emitting light path after the directional light optical system and with data acquisition and disposal system and electrically connects.
2. focal plane presetter device in the camera space vacuum according to claim 1 is characterized in that: said directional light optical system comprises parallel light tube, is arranged on the parallel light tube target and the grating chi of parallel light tube end; Said grating chi and data acquisition and disposal system electrically connect; The emergent light of said light source passes through parallel light tube target and parallel light tube successively.
3. focal plane presetter device in the camera space vacuum according to claim 2 is characterized in that: said vacuum system comprises vacuum tank; Said vacuum tank comprises tank body and is arranged on the light incidence window on the tank body; Said smooth incidence window is arranged on the emitting light path of directional light optical system; Camera to be measured places tank interior and is on the emitting light path of parallel light tube.
4. focal plane presetter device in the camera space vacuum according to claim 3 is characterized in that: said smooth incidence window is a transparent glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220215270 CN202614226U (en) | 2012-05-15 | 2012-05-15 | Focal plane presetting device in space camera vacuum |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220215270 CN202614226U (en) | 2012-05-15 | 2012-05-15 | Focal plane presetting device in space camera vacuum |
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| CN202614226U true CN202614226U (en) | 2012-12-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679963A (en) * | 2012-05-15 | 2012-09-19 | 中国科学院西安光学精密机械研究所 | Method and device for presetting focal plane in space camera vacuum |
| CN107131890A (en) * | 2017-05-31 | 2017-09-05 | 北京空间机电研究所 | A kind of geostationary orbit face battle array stares camera multi-channel integrated test system |
| CN109151279A (en) * | 2018-09-17 | 2019-01-04 | 北京空间机电研究所 | A kind of space mapping camera focal plane debugging device and method |
| CN112414680A (en) * | 2020-12-09 | 2021-02-26 | 北京空间机电研究所 | System and method for testing defocusing sensitivity coefficient of lens in low-temperature lens |
| CN113720353A (en) * | 2021-08-31 | 2021-11-30 | 中国科学院长春光学精密机械与物理研究所 | Alignment method of camera and light pipe in vacuum environment |
-
2012
- 2012-05-15 CN CN 201220215270 patent/CN202614226U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679963A (en) * | 2012-05-15 | 2012-09-19 | 中国科学院西安光学精密机械研究所 | Method and device for presetting focal plane in space camera vacuum |
| CN102679963B (en) * | 2012-05-15 | 2014-05-21 | 中国科学院西安光学精密机械研究所 | Method and device for presetting focal plane in space camera vacuum |
| CN107131890A (en) * | 2017-05-31 | 2017-09-05 | 北京空间机电研究所 | A kind of geostationary orbit face battle array stares camera multi-channel integrated test system |
| CN109151279A (en) * | 2018-09-17 | 2019-01-04 | 北京空间机电研究所 | A kind of space mapping camera focal plane debugging device and method |
| CN112414680A (en) * | 2020-12-09 | 2021-02-26 | 北京空间机电研究所 | System and method for testing defocusing sensitivity coefficient of lens in low-temperature lens |
| CN112414680B (en) * | 2020-12-09 | 2022-09-06 | 北京空间机电研究所 | System and method for testing defocusing sensitivity coefficient of lens in low-temperature lens |
| CN113720353A (en) * | 2021-08-31 | 2021-11-30 | 中国科学院长春光学精密机械与物理研究所 | Alignment method of camera and light pipe in vacuum environment |
| CN113720353B (en) * | 2021-08-31 | 2023-10-03 | 中国科学院长春光学精密机械与物理研究所 | Alignment method of camera and light pipe in vacuum environment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20170515 |