广域扫描成像探测系统像移补偿机构设计与验证OA

To address dynamic image motion induced by azimuthal rotation in wide-area scanning imaging systems,this paper proposed and implemented an optical image-motion compensation(IMC)system based on a grooved-cam-rocker mechanism.During the sensor integration period,the mechanism drove a flat mirror to introduce a small line-of-sight counter-deflection opposite to the scan direction,enabling peri⁃odic,real-time compensation of scan-induced image motion.The formation of image motion during scan⁃ning and the corresponding compensation principle were analyzed;cam-profile parameters were designed;a mapping between cam rotation angle and flat-mirror deflection angle was established;and a matching method between the integration time and the compensation time was designed.Experimental validation was performed using a wide-area scanning imaging and detection setup.Under continuous platform rota⁃tion at 10 r/min,the longitudinal/transverse CTF of USAF1951 target fringes in the dynamically compen⁃sated condition recovered to 73％/86％of that in static imaging,and the dot-target SSIM and PSNR rela⁃tive to the static reference increased to 0.845 and 15.46 dB,indicating that the compensated target images were essentially consistent with the static results.For both visible and infrared bands,and for rolling-shut⁃ter and global-shutter modes,UAV images free of geometric distortion and motion smear were obtained;the compensated image sharpness met the requirements for detecting and recognizing weak,small targets.The proposed mechanism achieved real-time image-motion compensation under continuous scanning and provided a reliable,economical solution for wide-area continuous-scanning imaging in low-altitude defense and related applications.