空间光学遥感器精密调焦机构设计与试验

Design and Experiment Research on Precision Focusing Mechanism of Space Remote Sensor

外界环境变化会引起空间光学遥感器产生离焦现象,导致遥感器成像质量下降,需要设计调焦机构来解决离焦问题。从保证遥感器成像质量和轻小型化的角度出发,详细介绍调焦机构的调焦方案、工作原理和系统组成,提出由双滑块机构实现调焦功能的新型调焦机构;对调焦机构的精度进行理论计算,得到该机构的定位精度和调焦镜的倾斜角度误差均满足设计指标要求。对环境试验前后的机构进行精度测试,试验结果表明,机构定位精度0.006 mm,调焦镜的最大倾斜角为16.5″,满足光学设计指标要求。理论分析和环境试验结果充分表明,该调焦机构具有结构稳定,定位精度高,环境适应性广泛等特性,在复杂多变的环境条件下能够满足空间光学遥感器精确调焦的目的。

The space optical remote sensor will generate the out of focus which leading the decrease of the quality of the remote sensor imaging, so a focusing mechanism is designed to solve the problem. In order to ensure the remote sensor imaging quality and the perspective of light miniaturization, the focusing scheme, working principle and system composition are introduced particularly, and then the double-slider mechanism is proposed to realize the focusing function. The position precision and focusing mirror tilt angle error can satisfy the requirement of the design index by the theoretical calculation to get the precision of the focusing mechanism. The data before and after testing indicate that the displacement error is less than 0.006 mm and the line tilt is less than 16.5″, which meets the requirement for use. Theoretical calculation and experimental results prove that this focusing structure has stable structure, high positioning accuracy, environment adaptability extensive features to meet the purpose of precise focus of space optical remote sensor.