Progress in Application of Laser Technology in Space-based Imaging
To meet the demand of fine feature recognition of high orbit targets,detection of sub centimeter level space debris,and active imaging technology for all-time and all-space,this paper compares and summarizes the working principles,imaging performance,advantages,and appli-cation development status of three types space-based imaging methods,including laser rader 3D imaging technology,Inverse Synthetic Aperture Ladar(ISAL)imaging technology,and laser ac-tive illumination imaging technology.For these space-based laser imaging methods,their key technologies include the miniaturized high-power lasers to enhance the signal-to-noise ratio and imaging distance.In addition,for 3D laser imaging and ISAL technology,it is necessary to de-velop large-array detector technology to improve their imaging field of view.Summarizing up the current various imaging methods,ISAL imaging technology is the only means for backlight ima-ging of long-distance targets in space,and has great development potential,However,target tracking and capture under backlight conditions need to be considered in application.In the fu-ture,ISAL space-based applications can consider using Inverse Synthetic Aperture Microwave Radar(ISAR)technology for field-of-view guided tracking.
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