According to the characteristics of a catadioptric omnidirectional imaging system in larger fields and higher noise shielding, the catadioptric omnidirectional optical system with a field of view in 360° horizontal azimuth and 45° to 90° elevation and operating in the region of Solar Blind UV was developed to detect UV targets. The key elements of the UV detection technology were overviewed and the design parameters for the catadioptric omnidirectional imaging system in Solar Blind UV(SBUV) were determined. Based on the aberration theory and characters of UV optical system, the processes of optical design including the allocation of parameters, solution of initial structure and the lens splitting were presented. The design results show that the diameter of 80％ encicled energy of SBUV panoramic imaging system is 20 μm,which is smaller than the pixel size of ICCD, and the MTF value of the system is higher than 0. 7@171p/mm over all fields. These data satisfy the requirements of the system. Furthermore, experiments are carried out to verity the feasibility of panoramic imaging in corona detection, and the results indicate that the image obtained has good quality.%利用折反射全景成像系统的大视场和高噪声屏蔽特性,研制了一套视场角为360°×(45～90°),相对孔径为1:2的"日盲"紫外折反射全景光学系统,用于紫外目标探测研究.综述了紫外探测技术要素,确定了紫外折反射全景光学系统设计参数.基于像差理论及紫外光学系统特性,从参数分配、初始结构求解入手,采用分裂透镜、加齐明镜等方法设计了光学系统.分析结果表明,"日盲"紫外折反射全景光学系统各视场能量集中度为80%的弥散圆直径均小于20 μm,低于紫外ICCD像元尺寸的30 μm,各视场MTF>0.7@17 lp/mm,满足设计指标要求.实验验证了外折反射全景技术用于电晕探测的可行性,实验图像成像效果良好.
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