大视场虚拟现实光学系统设计  

OPTICAL DESIGN ON THE VIRTUAL REALITY OPTICAL SYSTEM WITH A WIDE FIELD OF VIEW

作　　者：范君柳 赵蒙[2] 王军[2] 沙金巧[1,2] 陈宝华 吴泉英[2] 周心媛[2] FAN Junliu;ZHAO Meng;WANG Jun;SHA Jinqiao;CHEN Baohua;WU Quanying;ZHOU Xinyuan(Tianping College of Suzhou University of Science and Technology,Suzhou,Jiangsu 215000;School of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou,Jiangsu 215009)

机构地区：[1]苏州科技大学天平学院,江苏苏州215000 [2]苏州科技大学物理科学与技术学院,江苏苏州215009

出　　处：《物理与工程》2022年第5期144-149,共6页Physics and Engineering

基　　金：苏州科技大学天平学院教育教学改革研究课题(No.2020TJGB-08);江苏省高等教育教改研究课题(No.2021JSJG370);苏州科技大学校级教学改革与研究项目(No.2021JG-17)。

摘　　要：虚拟现实技术由于具有良好沉浸感和人机交互性强的特点而被广泛应用于军事训练、教育和医疗等领域。本文设计一款适用于虚拟现实头盔显示器的两片式大视场光学系统。利用单透镜作为初始结构,根据设计要求调整出瞳直径,出瞳距离,逐渐增大视场角,并采用非球面来优化提高光学系统的成像质量,减小畸变。设计完成的头盔显示器光学系统全视场角达到92°,所有视场下的调制传递函数值在奈奎斯特频率处均大于0.1,系统最大畸变为9%,并且在全视场范围内实现每度16.8像素数的角分辨率。实验结果表明:与单片式光学系统相比,本文设计的两片式系统具有更好的成像质量、更出色的边缘视场畸变和色差控制效果。此外,该光学系统重量轻、结构紧凑、成本低,可应用于新一代虚拟现实设备的头盔显示系统。The virtual reality(VR)technology is widely used in the military training,education,health care and other fields due to its characteristics of being highly immersive and human-computer interactive.A two-element optical system with a large field of view is designed which is suitable for the head mounted display(HMD)of the VR.A singlet lens is selected as the initial structure of the design.The diameter and distance of exit pupil are adjusted,and the field of view(FOV)is increased gradually according to the design specifications.The lens adopts the aspheric surfaces to improve the image quality and decrease the distortion of the system.The finished HMD optical system achieves a full FOV of 92 degrees.The modulation transfer functions(MTF)of all the FOVs are greater than 0.1,and the maximum distortion of the system is 9%.The angular resolution of the HMD optical system achieves 16.8 pixels per degree(PPD).The experimental results indicate that the two-element HMD system is ca-pable of producing images with higher quality and performs better in controlling the distortion and chromatic aberrations of the marginal FOV compared with the single-element system.In addition,the optical system has advantages of light weight,compact structure and low cost.It can be applied to a new generation of the VR HMD.

关 键 词：虚拟现实 头盔显示器 视场角 角分辨率 调制传递函数 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] O439[自动化与计算机技术—计算机科学与技术]