基于双波段共口径的弹着点位置检测光学系统设计  

Design of an Optical System for Detecting Impact Position Based on Dual-Band Common Aperture

作　　者：宋晓 高明[1] 吕宏[1] SONG Xiao;GAO Ming;LYU Hong(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,西安710021

出　　处：《西安工业大学学报》2021年第6期649-659,共11页Journal of Xi’an Technological University

基　　金：陆军装备预研项目(301XXX102)。

摘　　要：针对远距离大范围复杂环境下弹着点目标的探测识别受限问题,设计了一款双波段共口径连续变焦光学系统。选择折射式光学系统,采用共口径、棱镜分光设计方法,可见/长波红外双波段系统共用同一入射窗口,通过棱镜分光,实现可见光与长波红外同时成像。光学系统在0.38~0.76μm波段内实现18~180 mm的10^(×)连续变焦,在8~14μm波段内实现24~48 mm的2^(×)连续变焦,视场可达到25°,在-40~+60℃温度范围内采用机电主动式对系统进行消热差处理。结果表明,系统在可见光波段调制传递函数值在145 lp·mm^(-1)处均高于0.32,红外波段调制传递函数值在42 lp·mm^(-1)处均高于0.23,红外波段点列图各视场的RMS均方根值均在艾里斑以内。系统像面清晰,像质均匀,满足弹着点位置检测光学系统使用要求。The detection and identification of the impact position is limited in the wide-range and complex environment.In order to solve this problem,a dual-band common-aperture continuous zoom optical system was designed.A refractive optical system was selected and the design method of common aperture and prism splitting was adopted.The visible/long-wave infrared systems shared the same incident window,and the VIS/LWIR imaging was realized simultaneously through the prism splitting.The optical system achieved a 10^(×) continuous zoom of 18~180 mm in the band of 0.38~0.76μm and a 2^(×) continuous zoom of 24~48 mm in the band of 8~14μm.The field of view reached 25°.At the temperatures ranging from-40~+60℃,mechanical and electrical active thermal differential treatment was used for the system.The results show that the value of the system’s modulation transfer function in the visible band is higher than 0.32 at 145 lp·mm^(-1),and that the value of its modulation transfer function in the infrared band is higher than 0.23 at 42 lp·mm^(-1).The RMS root mean square values of each field of view in the point diagram of the infrared bands are all within the airy spots.The image surface is clear and the image quality is uniform,indicating that the system meets the requirements.

关 键 词：弹着点位置检测 双波段 共口径 折射式 消热差 

分 类 号：TN216[电子电信—物理电子学]