长波红外与激光共孔径双模导引光学系统研究  

Research on Long-Wave Infrared and Laser Common-Aperture DualMode Guided Optical System

作　　者：陈洁 夏团结 杨童[1] 杨磊[1] 谢洪波[1] Chen Jie;Xia Tuanjie;Yang Tong;Yang Lei;Xie Hongbo(Key Laboratory of OptoElectronic Information Technology,Ministry of Education,School of Precision Instruments and OptoElectronics Engineering,Tianjin University,Tianjin 300072,China;Advanced Photoelectric Detection Research and Development Center,Shanghai Aerospace Control Technology Institute,Shanghai 201100,China)

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室,天津300072 [2]上海航天控制技术研究所先进光电中心,上海201100

出　　处：《光学学报》2023年第12期184-193,共10页Acta Optica Sinica

摘　　要：为提高导引结构的特征分辨能力和全天候工作能力,提出一种长波红外与激光共孔径的双模导引光学系统设计方案,利用被动红外模块搜索目标,通过主动激光雷达模块锁定目标并精确制导。为解决导引头内光学系统尺寸受限的问题,以Ritchey-Chretien结构为共用部分,通过次镜镀分光膜实现长波红外(8~12μm)反射光路与激光(1.064μm)透射光路的组合,并分析了不同光学遮拦情况对非相干成像系统调制传递函数衍射极限的影响。展示了F数为0.98、光学遮拦比为1/3的共孔径双模导引系统的实例,使用多片折射镜片实现对主、次镜残余像差的补偿,利用光学被动式消热差方法完成-40~60℃范围的长波红外无热化,具有良好的热稳定性和可加工性,可为双模导引光学系统的分析与设计提供参考。Objective As the optical technology develops,in order to adapt to complex and changeable battlefield environments,composite guided modes have received more and more attention.Longwave infrared(LWIR)/laser dualmode seeker can provide complementary benefits such as allweather operation,antielectronic interference,and high hit accuracy.Currently,commonaperture dualband systems with a laser of 1.064μm and an LWIR of 8-12μm mostly use a halfreflecting mirror to realize beam splitting.The image space resolution and field of view of the infrared optical system still need to be improved.Aiming at improving the feature resolution ability and allweather working capability of the guidance structure,this paper proposed a new dualmode guided optical system based on a secondary mirror splitting method.The passive infrared module was used to search for the target,and the active lidar module was utilized to lock the target and realize guidance accurately,and thus the highprecision scanning and patrol in a compact structure could be realized.Methods The RitcheyChretien(RC)structure was used as a common component to address the issue of the seeker's limited optical system size,and the secondary mirror was coated with a beam splitter film to combine the longwave infrared reflection optical module with the laser transmission optical module.In addition,the paper studied the initial structure solution method of the catadioptric system,as well as the effect of various optical obscuration conditions on the diffraction limit of the modulation transfer function of the incoherent imaging system.An illustration of a commonaperture dualmode guided system with an optical obscuration ratio of 1/3 and an Fnumber of 0.98 was presented.The residual aberrations of the primary and secondary mirrors were compensated for by using several refractive lenses,and an optical passive athermalization method was used to complete the longwave infrared athermalization in the range of-40-60℃.By using Monte Carlo analysis,the assembly tolerance and optical c

关 键 词：光学设计 双模导引 长波红外光学系统 激光 共孔径结构 折反式系统 

分 类 号：TN21[电子电信—物理电子学]