基于单投影仪与柱面反射镜的沉浸感显示系统

Immersive display system based on single projector and cylindrical reflector

在分析传统沉浸感显示系统优缺点的基础上,设计并实现了一种新型的沉浸感显示系统。该系统使用柱面反射镜对单投影仪投射光线进行反射,并在弧形背投幕上成像,能够获得无缝画面,实现了广角度虚拟场景的连贯显示。通过合理设计柱面反射镜形状,实现了投影画面在水平方向上的均匀放大。通过对图像进行预变形可以基本消除因投影幕曲率而产生的投影画面形变,同时采用背投技术使参与者在虚拟场景中活动更加自如。该系统克服了传统的多投影仪或多显示器沉浸感显示系统中存在的图像拼接问题,且易于构建,经实验验证能够获得良好的沉浸感显示效果。

Through analyzing the advantages and disadvantages of traditional immersive display systems,a new immersive display system was designed and implemented.In this system,the light illuminated by one projector was reflected by a cylindrical reflector to a cambered rear projection screen.Seamless projection picture can be obtained and coherent displaying of wide-angle virtual scene could be implemented.By properly designing the surface of cylindrical reflector,it implemented uniform enlargement of the image on the horizontal direction.The distortion of the projection picture caused by the curvature of the screen could be basically removed through prior distortion of projected image and participants could acquire more moving freedom by means of rear projection.This system overcame the problem of image mosaics in traditional multi-projector and multi-display immersive display systems.It is simple for manufacturing and can achieve satisfying immersive display quality,which is verified by the experimental result.