双波段共口径消热差枪瞄物镜光学系统设计  

Design of optical system for dual-band co-aperture heatless gun objective lens

作　　者：白鑫如 蒋世磊[1] 弓旭航 蒋大成 冯江[3] BAI Xinru;JIANG Shilei;GONG Xuhang;JIANG Dacheng;FENG Jiang(School of Optoelectronic Engineering,Xi'an Technological University,Xi'an 710021,China;School of Electronic Information Engineering,Xi'an Technological University,Xi'an 710021,China;North China Research Institute of Electro-Optics,Beijing 100015,China)

机构地区：[1]西安工业大学光电工程学院,陕西西安710021 [2]西安工业大学电子信息工程学院,陕西西安710021 [3]华北光电技术研究所,北京100015

出　　处：《应用光学》2025年第1期32-40,共9页Journal of Applied Optics

基　　金：陕西省教育厅重点实验室科研计划(18JS053)。

摘　　要：为满足光电瞄准具昼夜合一、轻量化、稳定性优良的需求,本文设计了一款可见光和近红外双波段、共口径,且使用CMOS相机接收成像光束的共口径数码瞄准物镜。物镜光学系统设计波段为0.4μm~0.65μm和0.7μm~0.85μm,焦距为50 mm,F数1.4,系统总长90 mm,系统在-40℃~+50℃温度范围内无热差影响,各波段畸变均小于0.04%,可见光波段在100 lp/mm处MTF>0.55,近红外波段在100 lp/mm处MTF>0.3。通过优化系统敏感面引起的像差,合理分配光焦度,降低了系统加工公差灵敏度和系统装配难度及成本。设计结果表明:系统均采用球面镜,结构简单、体积小、成本低、公差良好,能够实现在全工作温度范围内成像质量良好,具有一定的工程应用前景。To meet the requirements of integrating day and night in electro-optical sights,lightweight design,and excellent stability,a dual-band co-aperture digital aiming objective lens that was visible and near-infrared was designed,and used a CMOS camera to receive the imaging beam.The optical system was designed for the wavelength ranges of 0.4μm~0.65μm and 0.7μm~0.85μm,with a focal length of 50 mm,an F-number of 1.4,and a total length of 90 mm.The system shows no thermal difference effects in the temperature range of−40℃ to 50℃,with distortion in each band less than 0.04%.In the visible light band,the modulation transfer function(MTF)is greater than 0.55 at 100 lp/mm,and in the near-infrared band,the MTF is greater than 0.3 at 100 lp/mm.By optimizing the aberrations caused by the sensitive surface of the system and properly distributing the optical power,the sensitivity of the system to processing tolerances,assembly difficulty,and cost were reduced.The design results show that the system uses spherical mirrors,making it simple in structure,small in size,low in cost,and with good tolerances,which can achieve good imaging quality across the entire operating temperature range,and has a certain engineering application prospect.

关 键 词：共口径枪瞄物镜 消热差 公差灵敏度 调制传递函数 光学系统 

分 类 号：TN214[电子电信—物理电子学]