一种折反式红外/激光复合导引头光学系统设计

周晓斌; 孙浩; 原琦; 刘召庆; 张衡; 文江华; 吴妍

doi:doi:10.5768/jao201940.0601009

应用光学, 2019, 40 (6): 987, 网络出版: 2020-02-11

一种折反式红外/激光复合导引头光学系统设计

Design of catadioptric infrared/laser compound seeker optical system

论文大纲

周晓斌 ^*孙浩原琦刘召庆张衡文江华吴妍

作者单位

西安应用光学研究所, 陕西西安 710065

折反式光学系统激光/红外双模导引头光学被动无热化激光线性区 catadioptric optical system laser/infrared dual-mode seeker optical passive athermalization laser linear region

摘要

设计了一种用于长波非制冷红外和半主动激光复合导引的共口径折反式光学系统。为了减小反射式系统的零件加工和装调难度, 将卡塞格林系统次反射镜简化为平面反射镜, 主反射镜采用金属抛物面, 优化目镜组透镜尺寸, 避免光路内部遮挡, 利用反射式系统一次像面, 配合红外材料选取实现红外通道的光学被动消热差设计; 在平行光路中设置平板分光和激光窄带滤光片, 提高系统分光效率和透过率。设计结果表明: 红外通道特征频率35.7 lp/mm处MTF＞0.2, 激光线性区为2°, 满足系统指标要求。

Abstract

A common-aperture catadioptric optical system for uncooled long-wave infared (LWIR) and semi-active laser compound guidance was designed. In order to reduce the difficulty of parts manufacturing and assembly of the reflective system, the secondary mirror of Cassegrain system was simplified to a plane mirror, and the primary mirror adopted metal paraboloid.The lens size of eyepiece group was optimized to avoid internal occlusion of optical path, and the optical passive athermalization design of infrared channel was realized by using the reflection system primary image plane and infrared materials. What’s more,the system spectral splitting efficiency and transmittance were improved by setting the beam splitting plate and laser narrow-band filter in the parallel optical path. Final design results show that at the characteristic frequency of infrared channel, the modulation transfer function (MTF) >0.2, the laser linear region is 2°, which meets the system index requirements.

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周晓斌, 孙浩, 原琦, 刘召庆, 张衡, 文江华, 吴妍. 一种折反式红外/激光复合导引头光学系统设计[J]. 应用光学, 2019, 40(6): 987. ZHOU Xiaobin, SUN Hao, YUAN Qi, LIU Zhaoqing, ZHANG Heng, WEN Jianghua, WU Yan. Design of catadioptric infrared/laser compound seeker optical system[J]. Journal of Applied Optics, 2019, 40(6): 987.

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