摘要

视网膜投影显示(RPD)是头戴显示器(HMD)领域的一个研究热点, 能够克服传统HMD辐辏聚焦矛盾(VAC)。为了使RPD小型便携化, 以微机电系统(MEMS)扫描镜作为空间光调制器(SLM)设计制造了折反式激光RPD系统。首先, 介绍了辐辏聚焦矛盾, 分析了RPD的基本原理。通过传统的RPD光路结构, 实验验证了以MEMS激光扫描投影作为图像源的麦克斯韦观察法原理的可行性, 分析并解决了黑斑问题。接着, 完成了RPD系统的光学设计, 分析评价了系统的性能。最后, 制造出小型便携式的原型机, 原型机瞳距可调, 视场角为30°(H)×22°(V), 无畸变, 并通过实验对其显示效果进行了验证。

Abstract

Retinal projection display (RPD) is one of the research hotspots in the field of head-mounted display (HMD), it can overcome the vergence-accommodation conflict (VAC) of the traditional HMD. In order to make the RPD small and portable, a catadioptric laser RPD system, which uses a micro-electromechanical system (MEMS) scanning mirror as the spatial light modulator (SLM), is designed and fabricated. Firstly, the vergence-accommodation conflict is introduced and the basic principle of RPD is analyzed. Then the feasibility of Maxwellian view principle that uses a MEMS laser scanning projection as the image source is experimentally verified by the traditional RPD optical structure. And the black speckle problem is analyzed and solved. The optical design of the RPD system is finished, and the performance of the system is analyzed and evaluated. Finally, the small portable prototype is fabricated, whose interpupillary distance is adjustable, with a viewing angle of 30°(H)×22°(V) and distortion-free. Display performance of the prototype is demonstrated through experiments.

补充资料

中图分类号：TN27

DOI：10.3788/aos201737.1222001

所属栏目：光学设计与制造

基金项目：国家重点研发计划(2016YFB1001502)、国家863计划(2015AA016301)、2014年“万人计划”青年拔尖人才支持计划

收稿日期：2017-05-27

修改稿日期：2017-06-28

网络出版日期：--

作者单位    点击查看

联系人作者：程德文(cdwlxk@163.com)

备注：林俊国(1993-), 男, 硕士研究生, 主要从事近眼显示方面的研究。E-mail: 2120150532@bit.edu.cn

【1】Rauschnabel P, Brem A, Ro Y. Augmented reality smart glasses: definition, conceptual insights, and managerial importance［J］. Working Paper, The University of Michigan-Dearborn, 2015.

【2】Kress B. The segmentation of the HMD market: optics for smart glasses, smart eyewear, AR and VR headsets［C］. SPIE, 2014, 9202: 92020D.

【3】Cakmakci O, Rolland J. Head-worn displays: a review［J］. Journal of Display Technology, 2006, 2(3): 199-216.

【4】Hu Xinrong, Liu Ying, Wang Jian, et al. Current progress in head-mounted display based on retinal scanning［J］. Infrared & Laser Engineering, 2014, 43(3): 871-878.
呼新荣, 刘英, 王健, 等. 基于视网膜扫描的头戴显示器研究现状［J］. 红外与激光工程, 2014, 43(3): 871-878.

【5】Lü Xiangbo, Wang Zhen, Wei Zhangfan, et al. Lightweight design of a helmet-mounted display optical system［J］. Acta Optica Sinica, 2015, 35(10): 1022007.
吕向博, 王振, 魏张帆, 等. 轻量化头戴显示器光学系统设计［J］. 光学学报, 2015, 35(10): 1022007.

【6】Gao Yuan, Liu Yue, Cheng Dewen, et al. A review on development of head mounted display［J］. Journal of Computer-Aided Design & Computer Graphics, 2016, 28(6): 896-904.
高源, 刘越, 程德文, 等. 头盔显示器发展综述［J］. 计算机辅助设计与图形学学报, 2016, 28(6): 896-904.

【7】Lin J G, Cheng D W, Yao C, et al. Retinal projection head-mounted display［J］. Frontiers of Optoelectronics, 2017, 10(1): 1-8.

【8】Kramida G. Resolving the vergence-accommodation conflict in head-mounted displays［J］. IEEE Transactions on Visualization & Computer Graphics, 2016, 22(7): 1912-1931.

【9】Webb R H, Hughes G W, Pomerantzeff O. Flying spot TV ophthalmoscope［J］. Applied Optics, 1980, 19(17): 2991-2997.

【10】Yoshinaka K. Display device: 61198892［P］. 1986-09-03.

【11】Kollin J. A retinal display for virtual-environment applications［C］. Society for Information Display, 1993 International Symposium, 1993: 827.

【12】Kollin J S, Tidwell M R. Optical engineering challenges of the virtual retinal display［C］. SPIE, 1995, 2537: 48-60.

【13】Sugawara M, Suzuki M, Miyauchi N. Late-news paper: retinal imaging laser eyewear with focus-free and augmented reality［J］. SID Symposium Digest of Technical Papers, 2016, 47(1): 164-167.

【14】Evans A T. Imaging a curved mirror and partially transparent plate: WO/2015/103640［P］. 2015-07-09.

【15】vonWaldkirch M. Effect of light coherence on depth of focus in head-mounted retinal projection displays［J］. Optical Engineering, 2004, 43(7): 1552-1560.

【16】Yang Minna, Guo Zhongda, Yang Zhiqiang. Helmet-mounted displays based on retinal projection display［J］. Journal of Applied Optics, 2012, 33(2): 370-373.
杨敏娜, 郭忠达, 阳志强. 基于视网膜投影显示的头盔显示器设计［J］. 应用光学, 2012, 33(2): 370-373.

【17】Ma J. Advanced MEMS-based technologies and displays［J］. Displays, 2015, 37: 2-10.

【18】Sliney D H. Laser and LED eye hazards: safety standards［J］. Optics & Photonics News, 1997, 8(9): 31.

引用该论文

Lin Junguo,Cong Qiang,Xu Chen,Cheng Dewen,Wang Yongtian. Design of MEMS Laser Scanning Retinal Projection Display System[J]. Acta Optica Sinica, 2017, 37(12): 1222001

林俊国,丛强,许晨,程德文,王涌天. MEMS激光扫描视网膜投影显示系统设计[J]. 光学学报, 2017, 37(12): 1222001