低照度固体成像夜视头戴系统物镜设计

Design of Objective Lens of Night Vision Head-Mounted System for Low Illumination Solid Imaging

为满足夜间低照度天候条件下装备维修保障需求,设计了一款大相对孔径的可见光/近红外波段的复消色差物镜。通过选择合适的光学玻璃材料,在可见/近红外波段很好地校正了二级光谱。设计完成的大相对孔径物镜焦距3.75 mm,F#为1.2,视场70.25°,畸变-17.5%,系统总长40 mm。该共焦型物镜在486~950 nm光谱范围条件下,无需调焦即能满足夜间观察使用需求,为低照度夜视头戴系统光学模组研制提供了新的技术手段。

In order to meet the requirement of equipment maintenance support in low illumination condition at night,a visible/near infrared achromatic objective lens with large relative aperture is designed.The secondary spectrum can be well corrected in the visible/near infrared band by mean of selecting suitable optical glass materials.The designed large relative aperture objective lens has a focal length of 3.75 mm,F#of 1.2,field of view of 70.25°,distortion of-17.5%and a total length of 40 mm.The con-focal objective lens can meet the requirements of night observation without focusing in the spectral range of 486~950 nm,which provides a new technical means for the development of optical module of lowillumination night vision head-mounted system.