CAJ | 학술논문

离焦补偿是空间光学相机获得良好成像品质的关键。文章基于空间光学相机的技术特点分析其离焦补偿方法，提出调节三镜的离焦补偿方法。利用CODE V光学软件对某高性能光学小相机的光学系统进行仿真分析，获得离焦补偿精度、离焦补偿范围与系统成像品质的关系。为保证光学系统对移动三镜倾角控制要求，对三镜调焦机构直线精度及其力学稳定性进行了测试，最后对相机进行了地面外景成像验证与在轨测试。仿真及试验测试结果表明，调节三镜能有效地补偿空间三反相机在轨各因素引起的系统离焦，满足相机在轨成像品质要求。
리초보상시공간광학상궤획득량호성상품질적관건。문장기우공간광학상궤적기술특점분석기리초보상방법，제출조절삼경적리초보상방법。이용CODE V광학연건대모고성능광학소상궤적광학계통진행방진분석，획득리초보상정도、리초보상범위여계통성상품질적관계。위보증광학계통대이동삼경경각공제요구，대삼경조초궤구직선정도급기역학은정성진행료측시，최후대상궤진행료지면외경성상험증여재궤측시。방진급시험측시결과표명，조절삼경능유효지보상공간삼반상궤재궤각인소인기적계통리초，만족상궤재궤성상품질요구。
Defocus compensation is the key to obtain high quality image for the space optical camera. The mechanism of defocus compensation is investigated based on the technical characteristics of space optical camera. A way to compensate the defocus through adjusting the tertiary mirror is proposed. Optical system of a high-performance optical camera is simulated by optical software CODE V. The correlation between image quality of the system and defocus compensation precision, defocus compensation range and other parameters are obtained. In order to ensure angle control requirements when mobiling the tertiary mirror for the optical system, linear precision and its mechanical stability are tested for the tertiary mirror focusing mechanism. At last,Both ground scenery imaging and orbit test are carried out for the camera. Simulation analysis and ex-perimental results demonstrate that for a coaxial three-mirror camera on orbit, adjusting its tertiary mirror can compensate system defocus caused by orbital factors, which meets the requirement of imaging quality for the camera on orbit.