折/衍混合微光夜视头盔显示器光学系统设计

设计了穿透式双通道单目微光夜视头盔的光学系统。其中微光物镜视场角为± 14°,f数为 1.4 ,含有一个衍射面。设计结果可兼容输入面尺寸为18mm ,面型为平面的二代和三代微光像增强器 ;最大畸变小于 0 .5 % ,可用于夜间精确瞄准与测量。考虑黑暗环境使用的安全问题 ,显示系统采用穿透式双通道单目光学系统 ,实现内部图像和外部真实世界的同时观察。显示系统的特性参量为 :出瞳尺寸为 15mm (H)× 10mm (V)、视场为[± 14°(H) ]× [± 10° (V) ]、出瞳距离为 2 5mm。采用全息组合器大大提高能量利用率。设计结果系统角分辨力为0 .6mrad ,最大畸变为 3%。显示系统结构紧凑 ,可与输出面尺寸为18mm的图像源相连。

Hybrid Diffractive-Refractive Optical System Design of Head-Mounted Display for Lightweight Night Vision

According to the development of the lightweight night vision device in the world and accelerating the research of the lightweight night vision technique, a hybrid optical system of head-mounted display used for lightweight night vision is designed. The parameters of objective are ±14° field-of-view and f=1.4. This objective with one diffractive surface can be compatible with second and third generation image intensifying tube with size of 18 mm and planar type of input surface. The maximal value of distortion could be ignored for it is less than 0.5% of objective and can be used to accurately measuring and aiming. Considering the safety problem, A see-through monocular display system is designed to deliver the information of the image and the real world to human eye with a holographic combiner. The features of display the system are 15 mm (H)×10 mm (V) exit pupil size, 25 mm exit pupil and [±14° (H)]×[±10° (V)] field-of-view. The resolution and distortion of display system are 0.6 mrad and 3%, respectively, and it can be matched with display size of 18 mm.