Agile satellite on-orbit image quality adjustment method and universal device
A technology of image quality and adjustment method, applied in the field of agile satellite imaging, can solve the problems of low efficiency of autonomous focus adjustment and independent bias current adjustment, and achieve the effect of avoiding adjustment methods
Inactive Publication Date: 2018-09-18
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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[0004] Based on this, it is necessary to provide an agile satellite on-orbit image quality adjustment method and a general-purpose device for the low efficiency of autonomous focusing and autonomous deflection adjustment in the current agile satellite on-orbit image quality adjustment.
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[0026] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0027] In one of the examples, as figure 1 As shown, the agile satellite on-orbit image quality adjustment method includes the following steps:
[0028] S1 determines the focusing interval according to the focal depth position calibrated on the ground;
[0029] S2 Focusing the front-end optical system of the agile satellite payload at least three times with the first step in the focusing interval, and acquiring images with overlapping areas after each focusing, and obtaining an image sequence;
[0030] S3 evaluates the image quality of the image sequence by using the evaluation function, and determines the optimal imaging focal plane position interval;
[0031] S4 Judging whether the optimal imaging focal plane position interval is greater than the preset focus accuracy threshold, if so, adjust the first step len...
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The invention relates to an agile satellite on-orbit image quality adjustment method and a universal device, and belongs to the technical field of agile satellite imaging. According to the method andthe device, through a plurality of times of focusing in a certain step length for an agile satellite load front-end optical system in a focusing interval and through determination of an optimum focalplane position by utilizing an evaluation function, autonomous focusing of on-orbit image quality of an agile satellite is achieved; and after autonomous focusing is finished, an image after focusingis acquired again, a drift angle is calculated, and an image plane of the agile satellite load front-end optical system is adjusted according to the drift angle, thus achieving autonomous drift adjustment of on-orbit image quality of the agile satellite. Through a plurality of times of image taking at stable moments of an agile satellite platform, satellite autonomous focusing and drift adjustmentcan be achieved at the same time. Information of the optimum focal plane position and the drift angle is acquired through an image calculation manner more conveniently, and on-orbit image quality adjustment of the agile satellite is achieved, thus avoiding traditional complex adjustment manners, and providing a guarantee for acquisition of high-resolution remove sensing images.
Description
technical field [0001] The invention relates to the technical field of agile satellite imaging, in particular to an agile satellite on-orbit image quality adjustment method and a general device. Background technique [0002] On-orbit image quality adjustment of agile satellites is a key step to ensure the image quality of aerospace optical remote sensing system, which mainly involves two processes of focusing and drift adjustment. During the launch process of the satellite, a series of factors such as vibration, pressure, and temperature directly caused the defocusing problem of the payload optical system; The image at the focal plane of the imaging system has both vertical and elongated image shifts, forming a deflection angle. The existence of defocus and drift angle directly causes the degradation of the image quality of the imaging system, which affects the acquisition of high-resolution remote sensing images. Therefore, research on autonomous image quality adjustment ...
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IPC IPC(8): G01C11/04
Inventor 曲宏松宋明珠张贵祥陶淑萍吴勇
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI