大视场大相对孔径日盲紫外告警光学系统设计

Design of solar-blind ultraviolet warning optical system with large FOV and large relative aperture

日盲紫外探测系统因其灵敏度极高、虚警率低、体积小、质量轻、结构简单、无需制冷等优点,在紫外制导、紫外通信等多个领域,尤其是导弹告警领域获得越来越多的应用。根据应用需求,设计了一种大视场大相对孔径日盲紫外告警光学系统。首先根据探测距离等任务要求,分析了告警系统光学口径等光学系统性能指标设计要求,结合实际情况进行光学系统选型与难点分析,综合采用三种方法解决了照度均匀性难题,并给出大视场大相对孔径日盲紫外光学系统设计结果,系统在工作谱段0.255~0.275μm范围内具有优良的像质,且仅采用熔石英一种材料,所有镜面均为球面,公差较松,有利于加工和装调。

Due to its high sensitivity,low false alarm rate,small volume,light weight,simple configuration and without cooling system,solar-blind ultraviolet detecting system is widely used in guidance,communication etc.,especially in missile warning.According to the application requirements,a solar-blind ultraviolet warning optical system with large field of view and large relative aperture was designed.Based on the requirements of working distance etc.,optical system aperture and other parameters were analized.Combined with the actual situation,the optical system selection and difficulty analysis were carried out.Three methods were used to solve the problem of illumination uniformity,and the design results of solar blind ultraviolet optical system with large field of view and large relative aperture were given.It has fine image quality in working spectrum 0.255-0.275μm.All elements were designed with sphere and used fused silica only,thus have loose tolerance and are convenient for manufacturing and alignment.