偏振扫描仪(POSP)是一台分孔径、分振幅同时偏振测量的遥感器。简要介绍了POSP的光机系统设计以及部分指标要求。为保证测量精度,针对仪器在运输与发射阶段力学以及在轨运行的热环境,对POSP光机进行了环境适应性设计与分析,并通过热真空与鉴定级力学试验进行验证。试验结果表明,仪器的基频约为110 Hz,各阶模态与仿真结果基本吻合,整机强度和刚度满足要求;热真空试验后,仪器遥感测量输出正常,光机各部组件工作正常。在热、力学试验前后分别进行了整机性能测试,结果显示试验前后视场重合度均大于90%,偏振精度优于0.5%。该仪器具有良好的空间热以及力学环境适应性,满足仪器地面和在轨稳定、可靠的工作需求。

The polarization scanner (POSP) is a remote sensor which can simultaneously measure polarization and aperture. The optical-mechanical system design and index requirements of POSP are introduced. In order to ensure the measurement accuracy, the environmental adaptability design and analysis of POSP are carried out aiming at the mechanical property during the transport and launch phases and the thermal environment of in-orbit operation, and the thermal vacuum and identification level mechanical tests are carried out. The experimental results show that the fundamental frequency of the instrument is about 110 Hz, and the modes are basically consistent with the simulation results. The strength and hardness of the whole machine meet requirements. After the thermal vacuum test, the output of the instrument is normal, and each component of the optical-mechanical system works normally. The performance of the whole machine is tested before and after the thermal and mechanical tests. The results show that the coincidence degree of field of view is more than 90%, and the polarization precision is better than 0.5%. The instrument has good adaptability to the space environment, and meets the stable and reliable work requirements on the ground and in orbit.