Design Of A Large Field Solar-blind Ultraviolet Warning Optical System

With the rapid development of science and technology around the world,modern weapons are emerging.Missiles have become one of the most aggressive weapons in modern warfare,and its threat to aircraft,tanks,and so on has received increasing attention.Therefore,how to make a quick judgment on the direction of missile attack becomes an urgent problem.Based on the solar-blind characteristics of 200nm~300nm band,a solar-blind ultraviolet warning optical system is designed.The PIXIS 2048 BUV ultraviolet CCD is selected as the detector with pixel size is 13.5?m×13.5?m and imaging area is 27.6mm×27.6mm.Its working band is from 240 nm to 280 nm.There are five lens in the system.The field of view is increased to 60°and the relative aperture is extended to 1:3 by using 1 binary optical element and 2 aspheric surfaces.System structure is simplified and image quality is improved by this way.After the system optimization,the spot diagram for each field of view is smaller than a single pixel size.More than 90% of the light energy for each field of view is received within a pixel size.The ultraviolet warning requirements of large field,large aperture and energy concentration are realized.