Study of a middle-wavelength infrared athermalized optical system  

作　　者：GAO Hong-yun XIONG Tao LI Sheng-hu 

机构地区：[1]Wuhan University of Technology, Wuhan 430070, China [2]Huazhong Institute of Optoelectronic Technology, Wuhan 430074, China

出　　处：《Optoelectronics Letters》2008年第5期351-353,共3页光电子快报（英文版）

摘　　要：For cooled 320 × 240 detector with staring focal plane array, a novel middle infrared athermal optical system is presented. The system is composed of 5 spherical lenses. The materials of lenses are silicon and germanium. The optical parameters and modulation transfer function （MTF） are investigated. The system has the diffraction limited image quality and stable image plane from -30 ℃ to 70 ℃. The characteristic parameters of the system are as follows：flnumber of 4, cold shield efficiency of 100%, spectrum region of 3.7-4.8 μm and transmissivity of 80%. The system has the merits of simple structure, low price, and it is easy to machining.

关 键 词：中波长 红外线 光学系统 球形晶状体 

分 类 号：TN216[电子电信—物理电子学]