激光扫描增强现实系统中抑制带斑的波导研究  

Banding Pattern Suppressed Waveguide in Laser Beam Scanning Augmented Reality System

作　　者：厉冰川 张杰 向诗文 王畅[2] Li Bingchuan;Zhang Jie;Xiang Shiwen;Wang Chang(Jiaxing ZMAX Optech Co.,Ltd.,Jiaxing 314000,Zhejiang,China;State Key Laboratory of Modern Optical Instrumentation,College of Optical Science and Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China)

机构地区：[1]嘉兴中润光学科技股份有限公司,浙江嘉兴314000 [2]浙江大学光电科学与工程学院现代光学仪器国家重点实验室,浙江杭州310027

出　　处：《激光与光电子学进展》2022年第20期121-127,共7页Laser & Optoelectronics Progress

摘　　要：为了抑制激光扫描显示的画面在经过二维出瞳扩展后出现的带状亮斑,改善显示效果,分析并讨论了画面中带斑产生的原因,研究了与带斑对比度相关的光学系统参数。接着提出一种使用双层平板光波导叠加进行出瞳扩展以抑制带斑对比度的方法。仿真结果表明:相对厚度为0.6 mm的单层波导系统,当两层平板波导厚度分别为0.64 mm和0.6 mm时,系统显示纯色时的带斑对比度将下降至23.2%。这种方式在不显著增加系统体积且具有较好工艺可实施性的前提下实现了对带斑现象的抑制,改善了系统成像质量,为激光扫描光机在增强显示系统中的应用提供了一种可行方案。The causes of the banding pattern in the images and the parameters of an optical system related to the banding contrast were studied to suppress the banding patterns that appeared in images displayed by a laser beam scanning system after a two-dimensional exit pupil expansion and to improve the display quality.Next,a method using dual-layered planar waveguide superposition was used to expand the exit pupil and suppress the banding contrast.According to the simulation,when the thicknesses of the dual-layered planar waveguide are 0.64 mm and 0.6 mm,respectively,the banding contrast of the pure color image displayed by the system decreases to 23.2%compared to single-layered waveguide system with thickness of 0.6 mm.This method can suppress the banding contrast and improve the display quality without significantly increasing the system volume or requiring complicated processing requirements.This method offers a solution by applying a laser beam scanning display to an augmented reality system.

关 键 词：几何光学 激光扫描显示 带斑 增强现实 

分 类 号：O435[机械工程—光学工程]