We present a way to achieve the compact augmented reality (AR) smart glasses with a large field of view (FOV). A planar waveguide and embedded narrow band minus filters are used for image transmission and coupling. The optical system based on the method is simple in structure and has the advantages of small size and lightweight. A geometric model for the propagation of light in the waveguide is constructed. Based on this model, the constraints of the structure and the dependence of designed parameters with viewing angles are analyzed. According to the calculations, a 3 mm thick waveguide is fabricated to investigate the feasibility of the theory. Experimental results demonstrate that the prototype can deliver a projected image and realize the fusion of the virtual image and the real scene as expected, the measured viewing FOV was about 50°.
Planar waveguide based augmented reality smart glasses with large field of view
First published at:Oct 18, 2019
 Vallino J R. Interactive augmented reality[D]. New York: University of Rochester, 1998.
 Shi Q, Wang Y T, Chen J. Vision-based algorithm for augmented reality registration[J]. Journal of Image and Graphics, 2002, 7(7): 679–683.
施琦, 王涌天, 陈靖. 一种基于视觉的增强现实三维注册算法[J]. 中国图象图形学报, 2002, 7(7): 679–683.
 Furness III T A. The super cockpit and its human factors challenges[J]. Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 1986, 30(1): 48–52.
 Pentenrieder K, Meier P. The need for accuracy statements in industrial Augmented Reality applications[C]//Proceedings of the 5th IEEE and ACM International Symposium on Mixed and Augmented Reality, Santa Barbara, 2006.
 Argotti Y, Davis L, Outters V, et al. Dynamic superimposition of synthetic objects on rigid and simple-deformable real objects[J]. Computers & Graphics, 2002, 26(6): 919–930.
 Rolland J P, Fuchs H. Optical versus video see-through head-mounted displays in medical visualization[J]. Presence: Teleoperators and Virtual Environments, 2000, 9(3): 287–309.
 Bichlmeier C, Heining S M, Feuerstein M, et al. The virtual mirror: A new interaction paradigm for augmented reality envi-ronments[J]. IEEE Transactions on Medical Imaging, 2009, 28(9): 1498–1510.
 Rosenthal M, State A, Lee J, et al. Augmented reality guidance for needle biopsies: an initial randomized, controlled trial in phantoms[J]. Medical Image Analysis, 2002, 6(3): 313–320.
 Ren B, Li L J, Cao W M, et al. Interactive urban design based on augmented reality[J]. Journal of Huazhong University of Science and Technology (Urban Science Edition), 2006, 23(2): 32–34.
任波, 李利军, 曹伟明, 等. 基于增强现实的交互式城市设计研究. 华中科技大学学报(城市科学版), 2006, 23(2): 32–34.
 Wang Y T, Liu Y, Hu X M. Study on key technique and application of outdoor AR system[J]. Journal of System Simulation, 2003, 15(3): 329–333, 337.
王涌天, 刘越, 胡晓明. 户外增强现实系统关键技术及其应用的研究[J]. 系统仿真学报, 2003, 15(3) 329–333, 337.
 Fjeld M, Voegtli B M. Augmented chemistry: an interactive educational workbench[C]//Proceedings, International Symposium on Mixed and Augmented Reality, Darmstadt, Germany, Germany, 2002: 259.
 Liu Z G, Li S Q, Li Z Q. Development and application of aug-mented reality[J]. Journal of System Simulation, 2003, 15(2): 222–225.
柳祖国, 李世其, 李作清. 增强现实技术的研究进展及应用[J]. 系统仿真学报, 2003, 15(2): 222–225.
 Microsoft HoloLens[EB/OL]. [2018-10-25]. https://www. mi-crosoft.com/ microsoft-hololens/en-us.
 Cakmakci O, Thompson K, Vallee P, et al. Design of a free-form single-element head-worn display[J]. Proceedings of SPIE, 2010, 7618: 1–6.
 Cheng D W, Wang Y T, Hua H, et al. Design of a wide-angle, lightweight head-mounted display using free-form optics tiling[J]. Optics Letters, 2011, 36(11): 2098–2100.
 Moverio BT-300 Smart Glasses[EB/OL]. (2018-10-25). https://epson.com/For-Work/Wearables/Smart-Glasses/Moverio-BT-300-Smart-Glasses-%28ARDeveloper-Edition%29-/p/V11H756020.
 Cheng D W, Wang Y T, Xu C, et al. Design of an ultra-thin near-eye display with geometrical waveguide and freeform optics[J]. Optics Express, 2014, 22(17): 20705–20719.
 Oku T, Akutsu K, Kuwahara M, et al. 15.2: high luminance see-through eyewear display with novel volume hologram waveguide technology[J]. SID Symposium Digest of Technical Papers, 2015, 46(1): 192–195.
 Amitai Y, Friesem A A, Weiss V. Holographic elements with high efficiency and low aberrations for helmet displays[J]. Applied Optics, 1989, 28(16): 3405–3416.
 Kress B. See through optical architectures for wearable dis-plays[C]//Applied Industrial Optics: Spectroscopy, Imaging and Metrology 2014, 2014.
 Li H, Zhang X, Shi G W, et al. Review and analysis of avionic helmet-mounted displays[J]. Optical Engineering, 2013, 52(11): 110901–110915.
 Thelen A. Design of optical minus filters[J]. Journal of the Optical Society of America, 1971, 61(3): 365–369.
 Amotchkina T V. Analytical estimations for the reference wavelength reflectance and width of high reflection zone of two-material periodic multilayers[J]. Applied Optics, 2013, 52(19): 4590–4595.
 Schallenberg U, Ploss B, Lappschies M, et al. Design and manufacturing of high-performance notch filters[J]. Proceedings of SPIE, 2010, 7739: 77391X.
 Hall J T. Controlled method of manufacture of multiple-notch rugate filters: U.S. Patent5, 009, 485[P]. 1991-04-23.
 Hendrix K D, Hulse C A, Ockenfuss G J, et al. Demonstration of narrowband notch and multi-notch filters[J]. Proceedings of SPIE, 2008, 7067: 706702.
 Zhang J L, Xie Y J, Cheng X B, et al. Thin-film thick-ness-modulated designs for optical minus filter[J]. Applied Optics, 2013, 52(23): 5788–5793.
Get Citation: Xiao Xue, Lin Xiao, Hao Jianying, et al. Planar waveguide based augmented reality smart glasses with large field of view[J]. Opto-Electronic Engineering, 2019, 46(10): 180550.