空间光学遥感器在轨照明环境模拟系统设计

发布时间：2018-06-09 03:52

本文选题：空间环境 + 太阳模拟器　；参考：《光子学报》2017年10期

【摘要】：针对复杂空间环境下光学遥感器的成像性能模拟测试需求,设计了一种大动态辐照、高对比度的空间环境模拟系统,包括太阳模拟器和暗目标模拟器.根据空间太阳光及地表反照光的辐照特性,采用氙灯电流调节及增加多孔衰减屏法实现太阳模拟器的大范围辐照度可调.通过对材料表面进行散射特性分析,设计了具有光陷阱结构的暗目标模拟器,以模拟相机视场内的暗弱观测目标.实验结果表明:该系统可以出射光斑尺寸为1 000mm×1 000mm,辐照度范围为0.4~1 260 W/m~2,辐照不均匀性可达±4.82%,暗目标模拟器的消光比可达1×10~(-7).该装置解决了空间强干扰光背景下暗目标成像性能的定量化测试难题,为光学遥感器的成像性能检测提供了一个可靠的平台.
[Abstract]:According to the requirement of imaging simulation and testing of optical remote sensor in complex space environment, a space environment simulation system with large dynamic irradiation and high contrast is designed, including solar simulator and dark target simulator. According to the radiation characteristics of space sunlight and surface reflected light, the wide range irradiance of solar simulator can be adjusted by adjusting the current of xenon lamp and increasing the porous attenuation screen. By analyzing the scattering characteristics of the material surface, a dark target simulator with light trap structure is designed to simulate the dark weak observation target in the field of view of the camera. The experimental results show that the light spot size of the system is 1 000mm 脳 1 000mm, the irradiance range is 0.4 ~ 1 260 W / m ~ (2), the irradiance inhomogeneity is 卤4.82 and the extinction ratio of the dark target simulator is 1 脳 10 ~ (10) ~ (-1) ~ (-1). The device solves the difficult problem of quantitative measurement of the imaging performance of dark targets in the background of strong spatial interference, and provides a reliable platform for the imaging performance detection of optical remote sensors.
【作者单位】：中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室;中国科学技术大学;
【基金】：中科院创新基金(No.CXJJ-17-M101) 国家自然科学基金青年基金(No.23003108B1716)资助~~
【分类号】：TP73

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