沉浸式头戴显示器光学系统设计

Design of immersive head-mounted display optical system

为了满足虚拟现实头戴显示器大视场、大出瞳和高成像质量等要求,采用非球面透镜设计了1种3片式虚拟现实头戴显示器光学系统,对光学系统进行了公差分析。结果表明,光学系统的平均调制传递函数(MTF)值均满足传递函数的要求;系统视场角为90°、出瞳直径为8mm、系统重量为33.67g、总长小于60mm、频率为9.31lp/mm时的MTF值均优于0.272,最大畸变为8.17%,最大垂轴色差为36.2μm,小于一个像素尺寸;与已有研究相比,增加了视场角、出瞳直径和出瞳距离等参量的信息,提高了成像质量。该研究为沉浸式头戴显示器的光学设计提供了参考。

In order to meet the requirements of the virtual reality head-mounted display with large field of view,large exit pupil,and high imaging quality,a three-piece virtual reality head-mounted display optical system was designed using aspheric lenses,and the tolerance analysis of the optical system was carried out.The results show that the average modulation transfer function(MTF)value of the optical system meets the transfer function requirements.The field of view of the system is 90°,the exit pupil diameter is 8mm,the system weight is 33.67g,the total length is less than 60mm,the MTF value at 9.31lp/mm is better than 0.272,the maximum distortion is 8.17%,and the maximum vertical chromatic aberration is 36.2μm that less than a pixel size,respectively.Compared with the literature,the field of view,exit pupil diameter,and exit pupil distance is respectively increased,and the imaging quality is improved.This study can provide a reference for the optical design of immersive head-mounted displays.