CN102538823B - System for detecting matching error of TDICCD (Time Delay and Integration Charge Coupled Device) focal plane different-speed imaging - Google Patents
System for detecting matching error of TDICCD (Time Delay and Integration Charge Coupled Device) focal plane different-speed imaging Download PDFInfo
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- CN102538823B CN102538823B CN201110452072.6A CN201110452072A CN102538823B CN 102538823 B CN102538823 B CN 102538823B CN 201110452072 A CN201110452072 A CN 201110452072A CN 102538823 B CN102538823 B CN 102538823B
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Abstract
The invention relates to a system for detecting matching error of TDICCD (Time Delay and Integration Charge Coupled Device) focal plane different-speed imaging. A dynamic target simulation device of the system is arranged in front of a parallel collimator; a zoom focusing and imaging system is arranged between the parallel collimator and a TDICCD focal plane and is composed of a group of zooming and imaging units; a control system adjusts focal distance and axial position of each zooming and imaging unit of the zoom focusing and imaging system, thus each imaging unit on the TDICCD focal plane produces target images at different speeds, moving speeds of the target images on each imaging unit on the TDICCD focal plane are calculated according to the focal distance of each zooming and imaging unit, a target rotating speed and the focal distance of the parallel collimator; and an image quick-look system analyzes dynamic target images, and a dynamic transfer function and a dynamic resolution of each imaging unit of the TDICCD focal plane are obtained by calculation. The system provided by the invention can be applied to detection on large-scale TDICCD focal plane imaging quality, image motion compensation accuracy and array different-speed image motion compensation matching accuracy.
Description
Technical field
The invention belongs to TDICCD imaging detection field, relate to a kind of large scale TDICCD focal plane friction speed imaging matching error detection system.
Background technology
Along with the development of remote sensing technology, more and more higher to the resolution requirement of satellite optical imagery, cover width requires increasing.In order to satisfy the demands, on the one hand, by increasing focal length and the effective aperture of camera optics system, can effectively improve the ground resolution of optical sensor; By increasing the apparent field angle of optical system, can effectively improve the ground cover width of optical sensor by the optical system that adopts long-focus, large visual field on the other hand.At present, adopt the TDICCD camera of the large scale focal plane of push-scanning image for the optical sensor of high resolving power, wide cover width more.
The TDICCD camera of large scale focal plane is in push-scanning image process, the pointing accuracy of satellite platform flight attitude, the factors such as degree of stability changes, drift angle changes, the high ratio of track speed changes, dither (or shake), and the performance difference of the each image-generating unit of large scale TDICCD focal plane all can cause camera in integration imaging process, produce picture move, image quality decrease is even worsened.For this reason, the image-forming condition of simulation satellite borne sensor carries out dynamic imaging to target, and the laboratory dynamic imaging characteristic of analyzing large scale TDICCD focal plane is particularly important.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of large scale TDICCD focal plane friction speed imaging matching error detection system.
In order to solve the problems of the technologies described above, large scale TDICCD focal plane friction speed imaging matching error detection system of the present invention comprises dynamic object analogue means, parallel light tube, zoom and focusing imaging system, control system, image quick look system; Described dynamic object analogue means is positioned at the front of parallel light tube; Zoom and focusing imaging system is between parallel light tube and TDICCD focal plane, and by one group of varifocal imaging cell formation, and each varifocal imaging unit is corresponding with the each image-generating unit position on TDICCD focal plane respectively; The dynamic object figure of dynamic object analogue means becomes dynamic object source, infinite distance after parallel light tube collimation, and this dynamic object source images in respectively on the corresponding image-generating unit of TDICCD focal plane through each varifocal imaging unit of zoom and focusing imaging system; Control system is by adjusting focal length value and the axial location of the each varifocal imaging of zoom and focusing imaging system unit, make to produce on the each image-generating unit on TDICCD focal plane the target picture of friction speed, receive the rotating speed of target of real focal length value and the dynamic object analogue means feedback of each varifocal imaging unit feedback simultaneously, calculate on TDICCD focal plane the target on each image-generating unit as translational speed according to the focal length value of the focal length value of each varifocal imaging unit, rotating speed of target and pre-stored parallel light tube; Image quick look system receives the dynamic object image of TDICCD focal plane output and it is analyzed, is calculated, and obtains dynamic transfer function and the dynamic resolution of the each image-generating unit of TDICCD focal plane.
The present invention is imaged on dynamic object source, infinite distance on each image-generating unit of TDICCD focal plane by zoom and focusing imaging system, make to produce on each image-generating unit the target picture of friction speed, readability according to each image-generating unit on TDICCD focal plane to dynamic object image that imaging obtains, TDICCD focal plane dynamic transfer function and the dynamic resolution that image quick look system 6 calculates, can confirm whether TDICCD focal plane exists friction speed imaging matching error.
Dynamic transfer function and the dynamic resolution of the each image-generating unit of TDICCD focal plane that the target providing according to control system in the present invention provides as translational speed, image quick look system, can compensate TDICCD camera, and can utilize the present invention to evaluate the dynamic IMC effect after compensation, image quality under drift angle state of a control, determines focal plane (infinite distance scenery) position of TDICCD camera.The present invention can be used for the detection of large scale TDICCD focal plane device image quality under drift angle state of a control, accuracy of image motion compensation, array friction speed IMC matching precision.
The present invention utilizes hyperchannel varifocal imaging system dexterously, by the focal length value of control system accurate adjustment image-generating unit, make different image-generating units produce focal length difference, coordinate dynamic object analogue means and parallel light tube to produce the different moving target of hyperchannel translational speed, provide friction speed target for large scale TDICCD focal plane friction speed looks like to move matching error detection.
The present invention utilizes image quick look system to receive in real time the output data of the moving target imaging of large scale TDICCD focal plane to different translational speeds, by analyzing, calculating the dynamic transfer function and the dynamic resolution that obtain the each imaging band of large scale TDICCD focal plane, to confirm that the friction speed of the each imaging band of large scale TDICCD focal plane looks like to move matching error and whether meets imaging requirements.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is large scale TDICCD focal plane friction speed imaging matching error detection system structural representation of the present invention.
Fig. 2 is dynamic object analogue means structural representation.
Fig. 3 is parallel light tube structural representation.
Embodiment
As shown in Figure 1, large scale TDICCD focal plane friction speed imaging matching error detection system of the present invention comprises dynamic object analogue means 1, parallel light tube 2, zoom and focusing imaging system 3, control system 5, image quick look system 6.
As shown in Figure 2, described dynamic object analogue means 1 is made up of pointolite 1-7, heat shield 1-13, catoptron 1-12, condenser 1-8, optical filter 1-9, the second catoptron 1-10, the 3rd catoptron 1-11, dynamic object rotary drum 1-1, the first catoptron 1-3, bias current mirror 1-2, precise rotating platform 1-4, drift angle rotary work-table 1-5 and worktable 1-6; It is upper that drift angle rotary work-table 1-5 is placed in worktable 1-6, and its rotation axis moves and coordinates with the circular hole on worktable 1-6; It is upper that precise rotating platform 1-4 is fixed on drift angle rotary work-table 1-5, the axis of its axis runout drift angle rotary work-table 1-5; It is upper that dynamic object rotary drum 1-1 is fixed on precise rotating platform 1-4, and be fixed with multiple Target Boards on dynamic object rotary drum 1-1 periphery; Bias current mirror 1-2 is positioned on the axis of drift angle rotary work-table 1-5, and its position maintains static, and the first catoptron 1-3 is fixed on the central shaft of drift angle rotary work-table 1-5; The light that pointolite 1-7 sends is converted to converging light through heat shield 1-13, condenser 1-8, after optical filter 1-9 homogenising, incide again the second catoptron 1-10, after the second catoptron 1-10 and the 3rd catoptron 1-11 reflection, be radiated on Target Board, Target Board images on bias current mirror 1-2 after the first catoptron 1-3 reflection.
Dynamic object rotary drum 1-1, by rotary axis, produces uniform motion target, and image surface is moved in analog.The parts such as 1-2 maintains static when bias current mirror, dynamic object rotary drum 1-1, along with drift angle rotary work-table 1-5 rotation can produce bias current target, provide dynamic object for the dynamic transfer function of TDICCD camera machine system detects.Dynamic object figure is made the channel(l)ed plate pattern of the equally spaced rectangular distribution of black and white, and stripe direction is vertical with target travel direction.In the time that dynamic object moves with certain rule perpendicular to optical axis, dynamic object figure is after parallel light tube collimation, and relatively tested TDICCD camera can be simulated the dynamic object of infinite distance.
Described parallel light tube 2 can adopt the common nothing of prior art to block parallel light tube, also can adopt structure as shown in Figure 3.
As shown in Figure 3, parallel light tube 2 is made up of primary mirror 2-3 and secondary mirror 2-2, the bias current mirror 1-2 of dynamic object analogue means 1 is placed on the focal plane 2-1 position of parallel light tube 2, and the light beam that dynamic object sends reflects, becomes parallel beam through primary mirror 2-3 reflection again through secondary mirror 2-2.
Described primary mirror 2-3, secondary mirror 2-2 adopt microcrystal glass material.
Described zoom and focusing imaging system 3 is by one group of varifocal imaging cell formation, and its effect is that the parallel beam that parallel light tube 2 is provided is imaged on TDICCD focal plane 4, the corresponding TDICCD image-generating unit in each varifocal imaging unit.According to the friction speed duty of TDICCD focal plane 4, change focal length value and the axial location of each varifocal imaging unit by control system 5, make different passages produce different zoom ratios, make to produce on each image-generating unit of TDICCD focal plane 4 the target picture of friction speed, receive the rotating speed of target of real focal length value and the dynamic object analogue means feedback of each varifocal imaging unit feedback simultaneously, calculate on TDICCD focal plane the target on each image-generating unit as translational speed according to the focal length value of the focal length value of each varifocal imaging unit, rotating speed of target and pre-stored parallel light tube 2.
It is imaging main body that single varifocal imaging unit in described zoom and focusing imaging system 3 adopts high-quality zoom lens, zoom process is with the high-precision encoder location of focusing, and guaranteeing provides speed accurately as moving target for large scale focal plane TDICCD friction speed imaging matching detection.
The different target picture of different image-generating unit inbound pacings on large scale TDICCD focal plane, image quick look system 6 is according to its output image data, by analysis, calculate after the each image-generating unit dynamic transfer function of TDICCD focal plane 4 and dynamic resolution, can confirm whether TDICCD focal plane exists friction speed imaging matching error.
The invention is not restricted to above-mentioned embodiment; dynamic object analogue means also can adopt other versions of the prior art; parallel light tube also can adopt other versions; therefore every any simple deformation of making on the claims in the present invention 1 technical scheme basis, all within the invention is intended to protection domain.
Claims (4)
1. a large scale TDICCD focal plane friction speed imaging matching error detection system, it is characterized in that comprising dynamic object analogue means (1), parallel light tube (2), zoom and focusing imaging system (3), control system (5), image quick look system (6); Described dynamic object analogue means (1) is positioned at the front of parallel light tube (2); Zoom and focusing imaging system (3) is positioned between parallel light tube (2) and TDICCD focal plane (4), by one group of varifocal imaging cell formation, and each varifocal imaging unit is corresponding with the each image-generating unit position on TDICCD focal plane (4) respectively; The dynamic object figure of dynamic object analogue means (1) becomes dynamic object source, infinite distance after parallel light tube (2) collimation, and this dynamic object source images in respectively on the corresponding image-generating unit of TDICCD focal plane (4) through each varifocal imaging unit of zoom and focusing imaging system (3); Control system (5) is by adjusting focal length value and the axial location of the each varifocal imaging of zoom and focusing imaging system (3) unit, make to produce on the each image-generating unit on TDICCD focal plane (4) the target picture of friction speed, receive the rotating speed of target of real focal length value and dynamic object analogue means (1) feedback of each varifocal imaging unit feedback simultaneously, calculate target on the upper each image-generating unit of TDICCD focal plane (4) as translational speed according to the focal length value of the focal length value of each varifocal imaging unit, rotating speed of target and pre-stored parallel light tube (2); Image quick look system (6) receives the dynamic object image of TDICCD focal plane (4) output and it is analyzed, is calculated, and obtains dynamic transfer function and the dynamic resolution of the each image-generating unit of TDICCD focal plane (4).
2. large scale TDICCD focal plane friction speed imaging matching error detection system according to claim 1, it is characterized in that described dynamic object analogue means (1) is by pointolite (1-7), heat shield (1-13), catoptron (1-12), condenser (1-8), optical filter (1-9), the second catoptron (1-10), the 3rd catoptron (1-11), dynamic object rotary drum (1-1), the first catoptron (1-3), bias current mirror (1-2), precise rotating platform (1-4), drift angle rotary work-table (1-5) and worktable (1-6) composition, it is upper that drift angle rotary work-table (1-5) is placed in worktable (1-6), and its rotation axis moves and coordinates with the circular hole on worktable (1-6), it is upper that precise rotating platform (1-4) is fixed on drift angle rotary work-table (1-5), the axis of its axis runout drift angle rotary work-table (1-5), it is upper that dynamic object rotary drum (1-1) is fixed on precise rotating platform (1-4), and be fixed with multiple Target Boards on dynamic object rotary drum (1-1) periphery, bias current mirror (1-2) is positioned on the axis of drift angle rotary work-table (1-5), and its position maintains static, and the first catoptron (1-3) is fixed on the central shaft of drift angle rotary work-table (1-5), the light that pointolite (1-7) sends is converted to converging light through heat shield (1-13), condenser (1-8), after optical filter (1-9) homogenising, incide the second catoptron (1-10) again, after the second catoptron (1-10) and the reflection of the 3rd catoptron (1-11), be radiated on Target Board, Target Board images on bias current mirror (1-2) after the first catoptron (1-3) reflection.
3. large scale TDICCD focal plane friction speed imaging matching error detection system according to claim 2, it is characterized in that described parallel light tube (2) is made up of primary mirror (2-3) and secondary mirror (2-2), the bias current mirror (1-2) of dynamic object analogue means (1) is placed on focal plane (2-1) position of parallel light tube (2), and the light beam that dynamic object sends reflects, becomes parallel beam through primary mirror (2-3) reflection again through secondary mirror (2-2).
4. large scale TDICCD focal plane friction speed imaging matching error detection system according to claim 3, is characterized in that described primary mirror (2-3), secondary mirror (2-2) adopt microcrystal glass material.
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| CN201110452072.6A CN102538823B (en) | 2011-12-29 | 2011-12-29 | System for detecting matching error of TDICCD (Time Delay and Integration Charge Coupled Device) focal plane different-speed imaging |
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| CN103033344B (en) * | 2012-12-14 | 2015-02-18 | 中国科学院长春光学精密机械与物理研究所 | Optical system focal distance detection method |
| CN103913295B (en) * | 2014-04-21 | 2016-03-30 | 中国科学院空间科学与应用研究中心 | A kind of area source for the detection of time delay integration imaging load and detection method |
| CN108181005B (en) * | 2017-11-17 | 2020-09-08 | 天津津航技术物理研究所 | Method and system for debugging focal plane of TDI CCD detector |
| CN108020871A (en) * | 2017-12-11 | 2018-05-11 | 中国科学院长春光学精密机械与物理研究所 | aerial camera infrared imaging device dynamic imaging quality test device and test method |
| CN111432203A (en) * | 2019-01-09 | 2020-07-17 | 中国科学院长春光学精密机械与物理研究所 | Dynamic transfer function dynamic image generation device and method |
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| CN113848638B (en) * | 2020-06-28 | 2024-03-12 | 中国科学院长春光学精密机械与物理研究所 | Micro LED optical system with dynamic compensation function |
| CN112666674A (en) * | 2020-12-28 | 2021-04-16 | 中国科学院长春光学精密机械与物理研究所 | Optical image motion compensation method and device |
| CN117939117B (en) * | 2024-03-25 | 2024-05-28 | 长春长光睿视光电技术有限责任公司 | Dynamic resolution detection method of aviation camera with forward image motion compensation function |
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