一种红外成像导引头光学系统杂散光的消除  

Stray Light Removing of Optical System of Infrared Imaging Seeker

作　　者：杨沛斌 徐瑞瑞 金晨 赵永库 YANG Peibin;XU Ruirui;JIN Chen;ZHAO Yongku(The First Aircraft Institute,AVIC,Xi’an 710000,China;No.93160 Unit of PLA,Luoyang 471000,China)

机构地区：[1]航空工业第一飞机设计研究院,西安710000 [2]中国人民解放军93160部队,河南洛阳471000

出　　处：《电光与控制》2024年第10期102-105,共4页Electronics Optics & Control

摘　　要：反射式红外成像导引头光学系统存在杂散光。首先,分析导引头系统的漏光杂散光,完成了导引头系统遮光罩的设计,系统遮拦比为0.476;然后,对二次反射鬼像进行分析发现,由后镜组第一片透镜的前、后表面引入的鬼像能量较强,提出必须提升该透镜表面的反射率以降低鬼像能量,而且外镜筒吸收率应达到0.9,以削弱结构件一次散射杂光对成像的影响;最后,使用光线模拟追迹软件ASAP进行仿真计算,得到系统的杂光系数为5.8%,证明了设计的可行性,保证了导引头光学系统的成像质量。Stray light exists in the optical system of reflective infrared imaging seeker.Firstly,the light leakageand stray light of the seeker system is analyzed,and the design of shade of the seeker system is completed.Thesystem shading,ratio is 0.476.Then,the secondary reflection ghost image is analyzed,and it is found thatthe ghost image energy introduced by the front and rear surfaces of the first lens in the rear mirror group isstronger.It is proposed that the reflectivity of the lens surface must be inereased to reduce the ghost imageenergy,and the absorption rate of the outer mirror hube should reach 0.9 to reduce the influence of the straylight scattered by the structural part on the imaging.Finally,the ray simulation tracking software ASAP isused for simulation,and the stray light coefficient of the system is 5.896,which proves the feasibility of thedesign and ensures the imaging quality of the seeker optical system.

关 键 词：杂散光 大口径反射式光学系统 遮光罩 二次反射鬼像 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]