CAJ | 학술논문

为了实现高分辨力，在地球静止轨道上工作的遥感系统通常装备大口径光学系统，但光学系统的视场通常很小。扫描成像技术可使地球静止轨道上的高分辨力遥感光学系统获得更大的观测范围。但在扫描镜转动时像点一直在移动，所以在 CCD 曝光时间内会出现像点混叠。因此，扫描成像光学系统的调制传递函数将变差。本文采用动态光学传递函数分析方法研究了连续扫描成像光学系统成像性能。结果表明，在曝光时间范围0.5～1.5 ms，扫描镜的旋转角度应小于(7×10-6)o以保持较高的MTF。最后，给出了连续扫描镜的驱动方法并分析了扫描镜驱动不稳定性对MTF的影响。本文的研究结果可为连续扫描成像光学系统的深入研究和制作提供参考。
위료실현고분변력，재지구정지궤도상공작적요감계통통상장비대구경광학계통，단광학계통적시장통상흔소。소묘성상기술가사지구정지궤도상적고분변력요감광학계통획득경대적관측범위。단재소묘경전동시상점일직재이동，소이재 CCD 폭광시간내회출현상점혼첩。인차，소묘성상광학계통적조제전체함수장변차。본문채용동태광학전체함수분석방법연구료련속소묘성상광학계통성상성능。결과표명，재폭광시간범위0.5～1.5 ms，소묘경적선전각도응소우(7×10-6)o이보지교고적MTF。최후，급출료련속소묘경적구동방법병분석료소묘경구동불은정성대MTF적영향。본문적연구결과가위련속소묘성상광학계통적심입연구화제작제공삼고。
In order to achieve high resolution, remote sensing system in the geo-stationary orbit is usually equipped with large aperture optical system. However, the field of view of the optical system is usually very small. Scan imaging technology can be adopted to achieve larger detection range for a high-resolution remote sensing optical system in the geo-stationary orbit. Therefore, the image spots keep moving with the rotary movement of scan mirror, and image spot aliasing emerges in each CCD exposure time. Thus, the Modulation Transfer Function (MTF) of scan imaging optical system degrades. Dynamic optical transfer function method is adopted to study the imaging characteristics of continuous scan imaging optical system. The results show that in exposure time range of 0.5～1.5 ms, the rotation angle of scan mirror should be less than 7×10-6degree to keep high MTF. Finally, a feasible drive method of the continuous scan mirror is given and the effect of driving instability on MTF is also analyzed. The results of this paper can provide references for further research and fabrication of continuous scan imaging optical systems.