眼模型下的投影式头盔物镜设计及视空间评价

进一步完善了投影式头盔系统的视空间评价方法,应用接近实际情况的眼模型来模拟人眼对头盔物镜系统进行评价。由视空间的评价结果出发,从眼模型的成像效果反过来进一步指导头盔系统的设计工作。设计结果显示,轴上视场和大视场的调制传递函数特性良好,在轴上视场可以达到1′的人眼最小分辨角,在大视场可以达到微显示器单个像素确定的视锐度,表明此系统在视空间的分辨力满足实际使用需要。系统最大畸变小于5%,色差不会对人眼分辨产生影响。

Design of Projection Lens for Head-Mounted Displays under Eye Model and the Optical Assessment in Visual Space

The optical assessment of head-mounted projection displays in visual space was further consummated. An eye model which was closer to the actual situation was used to simulate the human eye in order to give a detailed assessment of the projection lens. A further guidance on the design of projection lens from the imaging results of eye model was also carried on. The results showed modulation transfer function both on the zero and full field of view was good; on zero field of view, the minimum angular resolution of human eye was 1′, and on full field of view, the acuity determined by single-pixel of micro-display was achieved, so the system could completely satisfy the usability in head-mounted projective displays. Maximal distortion was less than 5%, and lateral color was unable to affect the angular resolution of human eye.