摘要
设计了有效焦距为35 mm,出瞳距离为23 mm,出瞳直径为12 mm,视场角为50°的透视式头盔投影显示器。该系统由一组双高斯透镜,一个半透半反镜和一个回射屏组成。回射屏的使用使双目设计的视场有效提高,畸变明显降低;二元面的引入,使系统在尺寸和重量上有明显的减少,像质进一步提高。该系统投影镜头部分重量仅为10.8 g,最大镜头直径为23.6 mm,完全满足双目设计的要求。目视系统中需重点校正的像散和垂轴色差的最大值分别为0.12 mm和7.89μm,最大畸变<0.5%。系统最小角分辨率为0.46 mrad,小于人眼的最小角分辨率,解决了普通透视式头盔显示器双目设计时宽视场实现难的问题。
A head-mounted projective display consisting of a pair of double-Gauss lens, a beam splitter, and a retro-reflective screen was designed, in which the feature parameters are 30 mm effective focal length, 23 mm exit pupil, 12 mm exit pupil size and 50° FOV （field of view）. The system uses a retro-reflective screen to increase effectively the FOV of binocular design and reduce the distortion. It also aolopts a diffractive optical element （DOE）to reduce the size and weight of the system and im-prove the imaging quality. The total weight and the maximal diameter of projective lens are 10.8 g and 23.6 mm, the astigmatic and lateral color are 0.12 mm and 7.89 μm, and the distortion is less than 0.5 %. The minimum angular resolution of this system is 0.46 mrad, which is less than that of human eyes.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2006年第4期564-569,共6页
Optics and Precision Engineering
关键词
光学设计
透视式头盔投影显示器
折/衍混合系统
回射屏
optical design see-through head-mounted projective display
hybrid diffractive /refractive system
retro-reflective screen
