半透膜阵列平板波导式头戴显示器光学系统设计  

Optical System Design of Head-Mounted Display Based on Planar Waveguide of Semi-Transparent Film Array

作　　者：呼新荣 刘英[1] 王健[1] 孙强[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《光学学报》2014年第9期216-221,共6页Acta Optica Sinica

基　　金：国家863计划(2013AA03A116);院地合作项目(2011CJT0004);吉林省科技发展计划(20125092)

摘　　要：为实现头戴显示器(HMD)的轻小型化,设计了一种新型的半透膜阵列平板波导式HMD光学系统。利用两个互相垂直放置的半透膜阵列波导实现了目镜出瞳的扩展,使得小出瞳目镜即可满足HMD使用需求,在缩小目镜体积的同时减轻了系统重量。通过对半透膜阵列平板波导结构的理论分析和光学系统建模,讨论了系统成像质量和出瞳辐照度分布规律。该系统总重约36g,视场为15°×20°,出瞳7mm×12mm,畸变小于0.13%,点斑均方根半径小于3.75μm,波像差均方根小于0.045λ,各视场光学调制传递函数在40lp/mm时大于0.58。结果表明,半透膜阵列平板波导装置能够有效扩展目镜出瞳,该系统能够满足HMD的使用要求。In order to reduce the weight and volume of the head-mounted display （HMD）, a planar waveguide HMD is designed based on semi-transparent film array. Two orthogonally placed semi-transparent film arrays are used to expand the eyepiecers exit pupil, as well as to make the HMD compact and light in weight. By analyzing the structure of planar optical waveguide, an optical system model is established. Then, imaging quality and irradiance distribution of the system is discussed. This system has a gross weight of about 36 g, a field of view （FOV） of 15°×20° and an exit pupil of 7 mm× 12 mm. The distortion is less than 0.13%. The root mean square （RMS） spot diameter is less than 3.75 μm. The RMS wave aberration is less than 0. 0451. The modulation transfer function （MTF） is higher than 0.58 at the spatial frequency of 40 lp/mm across the entire FOV. The results indicate that planar waveguide of semi-transparent film array can enlarge eyepiece＇s exit pupil effectively. This system satisfies the requirements of the HMD optical system.

关 键 词：光学设计 平板光波导 出瞳扩展 头戴显示器 半透膜阵列 

分 类 号：TN27[电子电信—物理电子学]