摘要
针对头盔显示器质量小、尺寸合适及结构紧凑方面的需求,利用离轴折/反射式原理设计一款头盔显示器光学系统,采用单片式自由曲面棱镜解决出瞳直径小的问题。设计的系统参数如下:出瞳直径8 mm,视场角20°(H)×15°(V),出瞳距离20 mm,配合0.47in的OLED-XLTM显示屏,显示区域9.6 mm×7.2 mm,像素数640pixel×480pixel,像元尺寸15μm×15μm。采用单个元件设计,体积小于13mm×25mm×17mm,所用材料为K26R,在30lp/mm时全视场调制传递函数大于0.25。该系统采用单个元件设计,兼顾成像质量的同时,使光学系统的体积和质量更小。
The helmet-mounted display demands light weight, suitable size, and compact structure. Aiming at the demands, we use the off-axis catadioptric principle to design a helmet-mounted display system, and the monolithic freeform surface prism is utilized to solve the problem of small exit pupil diameter. The designed system parameters are as follows ： the diameter of the exit pupil is 8 mm, the angle of field of view is 20°（H） ×15°（V）, distance of exit pupil is 20 mm, a 0.47 in OLED-XLTM display is selected, the display area is 9.6 mm ×7,2 mm, the pixel number is 640 pixelX 480 pixel, and the pixel size of 15 μm× 15 μm. A single element is adopted to design the system, whose volume is less than 13 min×25 mm× 17 mm. K26R is selected. The modulation transfer function at 30 lp/ mm in the full field of view is higher than 0.25. The system is designed with a single element, and realizes small volume and light weight with imaging quality taken into consideration.
出处
《激光与光电子学进展》
CSCD
北大核心
2017年第12期391-398,共8页
Laser & Optoelectronics Progress
基金
福建省科技厅重点项目(2013H0022)
福州市科技计划项目(2014-G-68)
关键词
光学设计
头盔显示器
自由曲面棱镜
折/反射式系统
离轴光学系统
optical design
helmet-mounted display
freeform surface prism
catadioptric system
off-axis optical system
