采用波前编码降低MWIR成像系统的温度敏感度  

Temperature Sensitivity Reduction of MWIR Space Image Sensor by Wavefront Coding

作　　者：张秉隆[1] 李博[1] 苏云 邱民朴[1] 

机构地区：[1]北京空间机电研究所,北京100076

出　　处：《航天返回与遥感》2011年第2期48-54,共7页Spacecraft Recovery & Remote Sensing

基　　金：中国空间技术研究院自主研发课题

摘　　要：波前编码成像由于可以大大扩展非相干成像系统的景深而不降低像质,成为近年来的研究热点。文章首先介绍了波前编码原理,然后基于波前编码原理对现有空间中波红外光学系统进行了优化改进,比较了原光学系统和改进系统在不同温度环境下的点扩散函数(PSF)、调制传递函数(MTF),结果表明,新系统在更大的温度范围内具有稳定的成像性能。For its excellent performance on extending the depth of field of the incoherent imaging system,wave-front coding（WFC） has been the research hotspot for many years.In this paper,the theory of WFC was introduced,and a phase mask for a space MWIR optical system is designed to reduce the temperature sensitivity using Zemax.PSF and MTF of the optical system with phase mask are compared with the outcome before using phase mask.The result shows that the new optics is nearly temperature-invariant,having better performance in even larger range of operation temperature.

关 键 词：波前编码 中波红外 温度不变性 空间相机 

分 类 号：TH703[机械工程—仪器科学与技术]