折叠光路结构头戴显示器的光学设计  

Optical design of pancake structured head-mounted display

作　　者：柏香虎 朱向冰[1] 庄亚宝 程芳芳 许子豪 朱俊峰 BAI Xianghu;ZHU Xiangbing;ZHUANG Yabao;CHENG Fangfang;XU Zihao;ZHU Junfeng(School of Physics and Electronic Information,Anhui Normal University,Wuhu 241002,China)

机构地区：[1]安徽师范大学物理与电子信息学院,芜湖241002

出　　处：《激光技术》2024年第5期746-751,共6页Laser Technology

摘　　要：为了满足虚拟现实头戴显示器大视场、大出瞳和高成像质量且结构轻小化等要求,采用逆向光路设计方法,对折叠光路pancake结构展开研究;采用两片透镜进行设计,进行了理论分析和软件仿真,对设计的光学系统进行了公差分析。结果表明,全视场角为96°、出瞳直径为10 mm、出瞳距离为14.94 mm时,在奈奎斯特频率(20.83 lp/mm)处调制传递函数(MTF)大于0.2,最大畸变为-26.5%,最大垂轴色差为13.84μm;此结构具有更高的MTF值、更小的垂轴色差和弥散斑均方根半径,像差平衡合理。该研究为折叠光路结构的头戴显示器提供了参考。In order to meet the requirements of large field of view,large exit pupil,high imaging quality and light and small structure of virtual reality head-mounted display,a reverse optical path design method was adopted to study pancake structure of a folding optical path.Two lenses were designed for theoretical analysis and software simulation,and the tolerance analysis of the designed optical system was carried out.The results show that the full field Angle is 96°,the exit pupil diameter is 10 mm,the exit pupil distance is 14.94 mm,the modulation transfer function(MTF)is greater than 0.2 at Nyquist frequency(20.83 lp/mm),the maximum distortion is-26.5%,and the maximum vertical color difference is 13.84μm,respectively.This structure has higher MTF value,smaller vertical color difference and root mean square radius of dispersion class,and reasonable aberration balance.This study provides a reference for the folding optical path structure of the head-mounted display.

关 键 词：光学设计 头戴显示器 折叠光路 虚拟现实 

分 类 号：O439[机械工程—光学工程] TN873[理学—光学]