机载双波段共口径光电瞄准光学系统设计  

Design of airborne dual-band common aperture photoelectric aiming optical system

作　　者：陈晓阳 高明[1] Chen Xiaoyang;Gao Ming(School of Optoelectronic Engineering,Xi'an Technological University,Xi'an 710021,China)

机构地区：[1]西安工业大学光电工程学院,陕西西安710021

出　　处：《红外与激光工程》2021年第5期147-156,共10页Infrared and Laser Engineering

基　　金：陆军装备XXX预研项目(301XXX102);陕西省重点实验室项目(17JS052)。

摘　　要：针对机载双波段共口径光电瞄准系统反射式成像存在中心遮拦与装配难度大的问题,设计了一种前置光路折射式成像的共口径光学系统。应用二组元变焦理论对光学系统的初始结构进行了计算。基于最小可分辨温差(MRTD)模型分析了红外系统的作用距离,根据瑞利判据对系统前向像移进行了补偿残差分析。机载双波段共口径光电瞄准光学系统工作在0.38~0.76μm的波段内,实现了36~180 mm的5×连续变焦,工作在3~5μm的波段内,实现了三视场变换,三视场三档焦距之比为3,F数为4。设计结果表明,在−40~60℃的工作环境中,光学系统经过光学被动式无热化处理,满足系统成像质量要求。Aiming at the problem of central obstruction and assembly difficulties in the reflective imaging of the airborne dual-band common-aperture photoelectric sighting system,a common-aperture optical system with frontlight path refraction imaging was designed.The initial structure of the optical system was calculated using the two-component zoom theory.Based on the Minimum Resolvable Temperature Difference(MRTD)model,the operating distance of infrared system was analyzed,and the compensation residual error of forward image motion was analyzed according to Rayleigh criterion.When the airborne dual-band common-aperture photoelectric aiming optical system worked in the waveband of 0.38-0.76μm,it can achieve 5×continuous zoom from 36 to 180 mm.When it worked in the 3-5μm waveband,it can realize three fields of view transformations,and the ratio of the three focal lengths of the three fields is 3.The working F number was 4.The design results show that,in the working environment of−40-60℃,the optical system undergoes optical passive athermalization treatment,which meets the requirements of system imaging quality.

关 键 词：双波段 共口径 消热差 MRTD 

分 类 号：TN216[电子电信—物理电子学]