【作者】 刘炳强； 李景林； 齐光； 孙斌；

【Author】 LIU Bing-qiang;LI Jing-lin;QI Guang;SUN Bin;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences;

【机构】 中国科学院长春光学精密机械与物理研究所；

【摘要】 调焦机构是空间相机获取良好遥感图像的重要保证。在调焦范围及定位精度满足要求的前提下,调焦机构运动同步性误差对成像质量也有较大影响。本文针对某型空间相机,首先,按照其光学系统参数计算得出,当系统光学传递函数下降不超过5%时,调焦机构运动同步性误差的最大允许值为0.02mm。其次,针对其采用的调焦机构,在分析了运动同步性误差产生原因的基础上,推导出运动同步性误差计算公式,并计算得到该调焦机构的最大运动同步性误差为0.015mm。最后,对该调焦机构进行实际测试,振动实验前后,该调焦机构的运动同步性误差分别为0.012mm和0.0013mm,表明该机构的运行非常稳定。理论分析以及实验结果表明,该调焦机构完全满足应用要求。更多还原

【Abstract】 The focusing mechanism plays an important role in acquiring remote sensing images for space camera.The error of synchronous motion of focusing mechanism has certain effect on the image quality on condition that the focusing range and accuracy meet the design requirements.Firstly,this paper makes calculations on the optical system of certain space camera,and draws a conclusion that when the MTF of the optical system declines no more than 5%,the maximum error of synchronous motion is 0.02 mm.Secondly,based on the analysis for the reasons of error of synchronous motion of the focusing mechanism,mis paper deduces the formula of error of synchronous motion and calculates that the maximum error of synchronous motion is 0.015 mm.Lastly,the actual error of synchronous motion before and after vibration test is 0.012 mm and 0.013 mm respectively,which indicates mat the focusing mechanism has great stability.Both the theoretical analysis and the experiments demonstrate that mis focusing mechanism meets the requirements of practical application quite well.更多还原