基于硅锗材料低成本中波红外光学系统无热化设计  

Athermalization Design of a Low-cost Medium-wave Infrared Optical System Based on Si/Ge Material

作　　者：贺磊 王仁浩 侯彬 司红利 杨克君 胡海力 HE Lei;WANG Renhao;HOU Bin;SI Hongli;YANG Kejun;HU Haili(Harbin XinGuang Photoelectric Technology Co.Ltd.,Harbin 150080,China;Military Representative Office of Rocket Army Equipment Department in Harbin Area,Harbin 150080,China;Harbin Institute of Technology,School of Astronautics,Harbin 150001,China)

机构地区：[1]哈尔滨新光光电科技股份有限公司,黑龙江哈尔滨150080 [2]火箭军装备部驻哈尔滨地区军事代表室,黑龙江哈尔滨150080 [3]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《红外技术》2023年第5期527-533,共7页Infrared Technology

摘　　要：为实现中波制冷红外导引头的低成本、无热化设计,采用两轴框架式总体布局方式,基于硅锗光学材料,利用一次成像3片式光学结构(Si-Ge-Si),选用斯特林制冷型面阵规模640×512像素尺寸为15μm的中波红外探测器作为接收器件,设计一种高分辨率低成本中波制冷红外成像制导光学系统,并实现了宽温范围内的无热化设计。设计结果表明,光学系统焦距为55 mm,视场大小为10°×8°,在33 lp/mm处,轴上0视场的调制传递函数(Modulation Transfer Function,MTF)不低于0.6,轴外0.7视场传递函数不低于0.40,畸变小于1%,冷光阑效率100%。同时,结合整流罩进行针对性优化设计,系统冷反射现象基本消除,在-40℃~+70℃温度范围内具有良好的成像效果。光学系统结构简单,易加工装校,良品率高。经实测样机,光学系统成像质量优良,各项性能指标满足技术指标要求。To realize the low-cost and athermalization design of medium-wave infrared seekers,a high-resolution medium-wave infrared imaging guidance optical system with infrared imaging guidance was designed with low-cost and wide-temperature-range athermalization.The general layout is a two-axis frame;the system chooses one imaging configuration with three pieces of lenses based on Si/Ge material.The detector chooses a Stirling-cooled 640 pixel×512 pixel detector with the pixel size of 15mm.The prototype design results show that the optical system focal length is 100 mm,field size is 10°×8°at 33 lp/mm,the axis view of the modulation transfer function(MTF)is not less than 0.6,0.7 field of the off-axis modulation transfer function(MTF)is not less than 0.40,the system distortion is less than 1%,and the efficiency of the cold stop is 100%.Moreover,the narcissus of the system is almost elimination based on pertinence optimization design with fairing.In the temperature range of-40 to 70℃,good image effect was realized.The optical system has the advantages of a simple structure,ease of processing and adjustment,and high yield rate;the imaging quality of the optical system is excellent,and the performance indexes meet the technical specifications.

关 键 词：低成本 无热化 中波红外 高分辨率 

分 类 号：TH741[机械工程—光学工程]