红外与毫米波学报, 2012, 31 (3): 210, 网络出版: 2012-06-14
基于波前编码的红外无热化光学系统相位掩模板热效应特性分析
Thermal effect on oddsymmetric phase mask in wavefrontcoded athermalized infrared imaging systems
摘要
分析了基于波前编码技术的无热化光学系统中相位掩模板的自身热效应,得到了不同温度下光瞳处相位板相位函数的变化.分析了由相位板热效应引起的波前编码系统成像特性的变化.通过数值及图像仿真证明了相位板热效应对波前编码无热化光学系统性能产生的影响.结果表明,相位板热效应对系统MTF(调制传递函数)的离焦不变特性和编码图像的可复原性产生严重的影响.
Abstract
Thermal effect on phase masks in wavefrontcoded athermalized imaging systems is analyzed. Several wellknown oddsymmetric phase functions at different temperature are derived. The properties of phase functions suffering from thermal effect are presented. The performances of the phase functions are evaluated with and without considering thermal effect by numerical simulation. The results show that the similarity of outoffocus MTFs and recoverability of blurred encoding images of the wavefrontcoded athermalized system are degraded severely by the thermal effect.
陈守谦, 范志刚, 许志高, 肖昊苏. 基于波前编码的红外无热化光学系统相位掩模板热效应特性分析[J]. 红外与毫米波学报, 2012, 31(3): 210. CHEN ShouQian, FAN ZhiGang, XU ZhiGao, XIAO HaoSu. Thermal effect on oddsymmetric phase mask in wavefrontcoded athermalized infrared imaging systems[J]. Journal of Infrared and Millimeter Waves, 2012, 31(3): 210.