用于三片式数字光处理投影显示的新型分色结构  

New Color Separation System of DLP Projection Display with Three Panels

作　　者：安凯[1] 凌志华[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《液晶与显示》2007年第2期119-123,共5页Chinese Journal of Liquid Crystals and Displays

基　　金：国家"973"资助项目(No.2003CB314704)

摘　　要：针对三片式数字光处理投影机光学系统中分色合色结构复杂、重量大、后焦距长的问题,提出了一种利用一个分色棱镜和两个二向色性滤色片来实现分色合色的方法。数字光处理投影机所用的光调制元件是数字微镜器件DMD,它是利用转动微反射镜改变反射光束的出射方向来实现光阀作用的。基于这一特点,通过精心安排分色棱镜和合色片的空间位置来实现对照明光束的分色以及对调制光束的合色功能。系统光学元件重量仅36 g,通过软件模拟本系统具有良好的色彩还原能力,光利用率达60%,还具有结构简单,对比度高等优点。In traditional DLP （Digital Light Processing） projection display system, the color separation and recombination system has the disadvantage of complexity, weight, long back-focus path, etc. This paper introduces a new design of color separation and recombination system which achieves the optical function by an X-cube prism, two dichroic filters and two reflectors. The light processing device of DLP projector is DMD （Digital Micromirror Device）. The DMD can reflect the direction of incidence light by turning the micromirror. Based on this characteristic, each optical component＇s position is elaborated to achieve the function of color separation and recombination. The total weight is only 36 g of optical components in this system. Simulation by software, this system has great color recoverability and the light efficiency is 60 %. It has the other advantage such as simple configuration, high contrast.

关 键 词：数字光处理 数字微镜器件 投影显示 分色棱镜 

分 类 号：TN141[电子电信—物理电子学]