Design of Large Aperture Transmission Ultraviolet Optical System Based on Solar-blind Ultraviolet Image Intensifier
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摘要: 以微光夜视技术重点实验室研制的AlGaN光阴极日盲紫外像增强器为基础，设计了一款匹配于日盲紫外像增强器的紫外光学系统，以提升探测器的探测性能。光学系统的工作波段在240~280 nm，视场角40°，相对孔径为1/2.5。系统由5块标准球面镜组成，光学系统总长50.74 mm；光学传递函数在空间频率为40 lp/mm时，轴上不小于0.8，轴外不小于0.6；成像质量良好，结构紧凑，满足设计要求。Abstract: Based on the AlGaN photocathode solar-blind UV image intensifier developed by the Science and Technology on Low-Light-Level Night Vision Laboratory, this study designs a UV optical system that matches the solar-blind UV image intensifier to improve the detection performance of the detector. The working wavelength of the optical system is 240-280 nm, the field of view is 40°, and the relative aperture is 1/2.5. The system consists of five lenses that are all spherical mirrors, and the total length of the optical system is 50.74 mm. When the optical transfer function is 40 lp/mm, the on- and off-axes are greater than or equal to 0.8 and 0.6, respectively. The imaging quality is good, and the structure is compact to meet the design requirements.
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