增强现实型头盔显示器光学系统设计  

Optical System Design for Augmented Reality Head-Mounted Display

作　　者：海小华 陈宇[1] 赵帅明 HAI Xiaohua;CHEN Yu;ZHAO Shuaiming(School of Opto-Electronic Engineering,Changchun University of Science and Technology,Changchun 130022)

机构地区：[1]长春理工大学光电工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2024年第6期1-8,共8页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：吉林省教育厅项目(JJKH20210821KJ)。

摘　　要：为实现头盔显示器图像清晰、尺寸合适、结构紧凑等方面的应用需求,选用自由曲面棱镜方案设计了一款基于自由曲面双棱镜结构的头盔显示光学系统。采用循序渐进、逐步迭代的优化策略,对投影系统和透视系统进行优化设计。最终实现了在全视场范围内,调制传递函数值在30 lp/mm处大于0.3。将投影系统和透视系统组合后,整体系统工作于可见光波段,视场为34.7°×20°,出瞳直径为6 mm,出瞳距离为20 mm,整体尺寸为33.16 mm×23.13 mm×12.3 mm。设计结果表明,这款头盔显示光学系统具备大视场、大出瞳距以及小体积等优点,可以充分满足用户对增强现实型头盔显示器的需求。In order to meet the application requirements of clear images,appropriate size,and compact structure of helmet displays,a helmet display optical system based on a freeform prism structure was designed using a freeform prism scheme.Adopting a gradual and iterative optimization strategy,optimize the design of the projection system and perspective system.Finally,i t was achieved that the modulation transfer function value was greater than 0.3 at 30 lp/mm across the entire field of view.After combining the projection system and perspective system,t he overall system operates in the visible light band,with a field of view of 34.7°×20°,an exit pupil diameter of 6 mm,an exit pupil distance of 20 mm,and an overall size of 33.16 mm×23.13 mm×12.3 mm.The design results indicate that this helmet display optical system has a large field of view,large pupil distance,and small size,which can fully meet the needs of users for augmented reality helmet displays.

关 键 词：光学设计 头盔显示器 自由曲面棱镜 

分 类 号：O439[机械工程—光学工程]