含三层衍射元件的60°视场折/衍混合头盔目镜(英文)

Hybrid Diffractive-refractive 60° Field of View Eyepiece with Three-layer Diffractive Optical Element

设计了一种含有三层衍射光学元件的60°视场头盔显示目镜,并给出了系统优化过程和结果.在整个视场和设计波段范围内三层衍射光学元件的衍射效率均在90%以上,提高了系统的光能利用率和像的对比度.此目镜光学系统的出瞳直径为8mm,出瞳距离为22mm.整个系统重量仅为8g,总长度为26.8mm,结构轻便紧凑,具有良好的光学性能,满足头盔显示目镜的使用需求.

A hybrid diffractive-refractive 60° field of view（FOV） eyepiece for head-mounted display（HMD） with a three-layer diffractive optical element（DOE） is designed,and the design performance is given.The diffraction efficiency of the three-layer diffractive optical element is larger than 90% at each FOV and wavelength in designed band,so that the utilization rate of energy and contrast ratio of image can be improved.The system has an 8 mm exit pupil and a 22 mm eye relief,and the feature of 8 g weight and 26.8 system size guarantee the lightness and compactness of the structure,which are well to be a eyepiece for HMD.