中文摘要：

为满足双目头盔显示器对大视场的要求,对它进行了改进。设计了以微液晶显示器为图像源,有效焦距为35mm,出瞳距离为23mm,出瞳直径为12mm,视场角为40°的头盔投影显示器。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;衍射面的引入,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6.8g,最大镜头直径为16.8mm,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0.32mm和13.1μm,最大畸变不足0.1%。选用分辨率为1024×768、像素尺寸为25μm的图像源,系统分辨率满足图像源的要求。

英文摘要：

A Head-mounted Projective Display （HMPD） with a miniature LCD as its image source is designed, of which the features are effective focal length of 35mm, exit pupil of 23mm, exit pupil size of 12mm and field-of-view （FOV） of 40 deg. This system consists of a pair of double-gauss lens, a beam splitter, and a retro-reflective screen. The usage of the retro-reflective screen increases the FOV effectively for binocular design, and reduces the distortion obviously. The adoption of a Diffractive Optical Element （DOE） offers considerable reduction in the size and weight, and improves the imaging quality, The total weight and the maximal diameter of projective lens are 6.8g and 16.8mm respectively, which meet the design requirement of the binocular completely, The astigmatism and lateral color aberration which need to correct in visual system are 0,32mm and 13.1micron respectively, and the distortion is less than 0.1%, The selected resolution of display is 1024×768, and the pixel size is 25 micron.