虚像显示系统自由曲面光学设计

为解决模拟器虚像显示系统由于离轴显示限制视场、眼点前移大幅降低边缘像质的问题，设计一种新型离轴虚像显示系统。利用像差理论，采用光线追迹方法，在全视场立体空间反向追迹光线，应用弥散斑均方根半径和平行度误差对 R2450-500-60°视景系统进行像质评价。结果表明：该设计能够改善像质，减小双目不平行度，使边缘视场角与像质达到要求。该设计系统不仅能大幅改善其光学性能，将垂直现场扩大到60°，而且实现成本较低，能进行大尺寸、大视场应用，满足多任务飞行模拟器的需求。

Design for Abnormity Free Form Screen of Virtual Image Display System

Because of off-axial display, field of view in collimated display system of flight simulators is restricted and forward movement of eye point reduces edge imaging quality greatly, design a new off-axial virtual image display system. Use aberration theory, adopt light tracking method, reversely track light in full vision field stereo space, and use defocused spots mean square root radius and parallel degree error to carry out image quality evaluation for R2450-500-60° visual system. The results show that the design can improve image quality, reduce binocular non-parallelism, and make the edge field angle and image quality meet the requirements. The design system can improve its optical properties, and extend vertical field of view to 60°. It fulfills the large field of view requests of multi-mission flight simulators with low cost.