摘要
基于对多层衍射元件的衍射效率的理论分析,设计了用于头盔显示器的含有多层衍射元件的60°视场折/衍射混合目镜系统。系统在设计波段和整个视场范围内衍射效率均在90%以上,提高了光能利用率和像面对比度。目镜的出瞳距离为22mm,出瞳直径为8mm。调制传递函数(MTF)在25lp/mm时全视场均在0.38以上,满足VGA分辨率要求。目镜中畸变为4.8%,垂轴色差最大为10μm。整个系统结构紧凑,镜头总长26.8mm,最大直径16mm,全系统质量仅8g,实现了光学系统的轻小型化。
Based on the theory analysis of diffraction efficiency of multilayer diffractive optical element （MDOE）, a hybrid diffractive-refractive eyepiece for head-mounted display （HMD） with MDOE was designed. The diffraction efficiency of the system at each field of view （FOV） and in design wave band was lager than 90%, which improved the utilization rate of energy and contrast ratio of image. The exit pupil distance and diameter of 60% FOV eyepiece were 22 mm and 8 mm. The distortion was less than 4.8 % and the maximum lateral color difference was 10 μm. The modulation transfer function （MTF） value was more than 0.38 for all FOV at spa- tial frequency 25 lp/mm. It met the requirement of VGA resolution. The structure of the total system is compact, the length of lens is 26.8 mm, the maximum diameter is 16 mm, and the weight of the entire system is only 8 g. It realizes the miniaturization optical system.
出处
《应用光学》
CAS
CSCD
北大核心
2013年第3期402-406,共5页
Journal of Applied Optics
基金
浙江省自然科学基金(Y1100524)
浙江师范大学创新团队和浙江师范大学博士启动基金(ZC304009168)
关键词
光学
光学设计
头盔目镜
折
衍射混合
多层衍射光学元件
optics
optical design
eyepiece for head-mounted display
hybrid diffractive/refrac- tive
multilayer diffraction optical element
