摘要
针对大视场近眼显示系统体积较大,像差校正困难的问题,文中提出了一种基于非对称视场的自由曲面近眼显示光学系统.利用正负视场非对称设置和折/反混合结构,在大叠加视场条件下,将合光镜口径减小了1/3.为了提高成像质量,引入自由曲面对离轴像差进行仿真校正.研究结果表明:近眼显示光学系统水平视场为+50°^-12°,垂直视场为30°,出瞳直径为6.3 mm,焦距为-21 mm,工作波长为0.38~0.76μm,系统在空间频率50 lp/mm处,全视场传递函数值高于0.37,系统畸变在5%以内.
The research is aimed to solve the problem that the Near-eye display optical system is large in size and poor in aberration correction in a large field of view. A free surface near vision optical system based on an asymmetric field of view is proposed. By using a positive and negative field of view asymmetric setting and folding/anti-mixing structure,in a large stack of field,the beam diameter is reduced by 1/3. In order to improve the image quality,the free surface is introduced into the system to simulate the off-axis aberration. The horizontal field of view of the optical system ranges from ＋ 50° to -12°,the vertical field of view is 30°,the pupil diameter is 6. 3 mm,the focal length is -21 mm,and the working wavelength is 0. 38 ~ 0. 76 um. The full-field transfer function value is higher than 0. 37 at the spatial frequency 50 lp/mm. The system distortion is less than 5%.
出处
《西安工业大学学报》
CAS
2017年第9期671-677,共7页
Journal of Xi’an Technological University
基金
陕西省教育厅重点实验室项目(17JS052)
关键词
近眼显示
自由曲面
离轴像差
非对称视场
near-eye display
free-form surface
off-axis aberration
asymmetric field of view
