Portable waveguide display system with a large field of view by integrating freeform elements and volume holograms
Portable waveguide display system with a large field of view by integrating freeform elements and volume holograms
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通过集成自由形状元件和体积全息图而具有大视场的便携式波导显示系统
DOI：
10.1364/oe.23.003534
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发表时间：
2015-02-09
期刊：
影响因子：
3.8
通讯作者：
Wang, Yongtian
中科院分区：
文献类型：
--
作者：
Han, Jian;Liu, Juan;Wang, Yongtian
本文首次提出了一种集成自由曲面元件和体全息图的紧凑型波导显示系统。自由曲面元件的使用可以拓宽全息光波导的视场，这限制了全息光波导的应用。当波导平面厚度为3mm时，优化后的系统可以获得45度的对角视场。本文详细设计了自由曲面元件入耦合器和体全息出耦合器，并分析了光栅结构对衍射效率的影响。通过引入耦合器可以很好地补偿离轴像差，优化后的波导显示系统衍射效率可达87.57%。该单色显示系统采用一体化设计，稳定可靠，通过体全息图的记录可以方便地控制系统的准直，使大规模生产成为可能。(C)2015美国光学学会
A compact waveguide display system integrating freeform elements and volume holograms is presented here for the first time. The use of freeform elements can broaden the field of view, which limits the applications of a holographic waveguide. An optimized system can achieve a diagonal field of view of 45 degrees when the thickness of the waveguide planar is 3mm. Freeform-elements in-coupler and the volume holograms out-coupler were designed in detail in our study, and the influence of grating configurations on diffraction efficiency was analyzed thoroughly. The off-axis aberrations were well compensated by the in-coupler and the diffraction efficiency of the optimized waveguide display system could reach 87.57%. With integrated design, stability and reliability of this monochromatic display system were achieved and the alignment of the system was easily controlled by the record of the volume holograms, which makes mass production possible. (C) 2015 Optical Society of America