大视场高分辨率光学拼接头盔显示器的设计  

Design of Wide FOV Optical-Tiled Head-Mounted Display with High-Resolution

作　　者：王士铭 程德文[1] 黄一帆[1] 王涌天[1] Wang Shiming;Cheng Dewen;Huang Yifan;Wang Yongtian(School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China)

机构地区：[1]北京理工大学光电学院,北京100081

出　　处：《激光与光电子学进展》2018年第6期364-369,共6页Laser & Optoelectronics Progress

基　　金：国家重点研发计划(2016YFB1001502)

摘　　要：视场角(FOV)和分辨率是头盔显示器(HMD)非常重要的两个参数。但是由于"视场角-分辨率不变量"的存在,限制了单一通道头盔显示器同时实现大视场角和高分辨率的能力,通过拼接的方法可以有效地打破这个限制。利用4个经过精密切割的球面透镜进行拼接,组成双目头盔显示器,每只眼睛各包括两个通道。目镜由两个通道组成,水平视场角为111.4°,竖直最大视场角为90°。在原型机中,用三个6inch(15.24cm)、分辨率为1920pixel×1080pixel的液晶显示屏作为图像源。单目角分辨率达到3.85arcmin。通过3D打印的方式制作了头盔显示器原型机的外部结构。对于拼接系统中的关键问题,如出瞳直径和出瞳距离进行详细讨论。基于这些讨论,在LightTools中对人眼视网膜的光强分布进行仿真。另外,根据镜片设计的畸变数据获得了处理之后的畸变图像。对原型机进行图像显示实验,验证所提方法的可行性。Field of view （FOV） and resolution are very important parameters for head-mounted displays （HMD）. However, so-called ＂ resolution/field-of-view invariant＂ prevents single-channel HMD from achieving both high resolution and wide FOV. This limitation can be effectively broken by the tiled method. A binocular optical-tiled HMD with four spherical lenses that have been cut precisely is designed. Each eye includes two channels. For an eyepiece consisting of two channels, the horizontal FOV is 111.4° and the maximum vertical FOV is 90°. Three 6 inch （15.24 cm） liquid crystal displays with resolution of 1920 pixel × 1080 pixel are used in this prototype as image source. The monocular angle resolution reaches 3.85 arcmin. 3D printing is also used to make the external structure of the HMD prototype. Key issues in the tiled system, such as exit pupil and exit pupil distance, are analyzed in detail. Based on these discussions, the intensity distribution of the human eye retina is simulated in LightTools. In addition, according to the distorted data of the lens design, the distorted image after processing is obtained. The image display experiment is performed on the prototype, and the results verify the feasibility of the proposed method.

关 键 词：光学设计 头盔显示器 光学拼接 虚拟现实 

分 类 号：O435[机械工程—光学工程]