标题: | 应用于DLP投影系统之高对比棱镜设计 A DLP projection system with high contrast ratio prism design |
作者: | 黄雍智 Huang, Yung-Chih 潘瑞文 Pan, Jui-Wen 照明与能源光电研究所 |
关键字: | 系统设计;棱镜;对比度;照明系统;Systems design;Prisms;contrast ratio;Illumination design |
公开日期: | 2013 |
摘要: | 在这篇论文中,我们提出一个可用于DLP投影系统的高对比且可同时保持光学效率的新型棱镜。这个新型的棱镜主要功能在杂散光进入镜头前将其转向移除。此新型棱镜的工作原理在这篇论文中将被推导。因为杂散光可以在进入镜头前藉由全反射面转向,因此可以有效的改善影像品质。跟传统的提升对比方法比较,FO:FO对比度将从839:1提升到48250:1,ANSI对比度从174:1提升到306:1。在提升对比度的同时,投影系统的光学效率可以维持在76.2%。 In this thesis, a novel prism with contrast ratio enhancement but maintaining the optical efficiency of the DLP projection system is proposed. The main capability of the novel prism is to direct the uncontrolled light away from the image system. The working theorem for the novel prism is derived as well. Uncontrolled light is kept away from the image system by a total internal reflection surface, thereby effectively improving the image quality. Compared with the conventional contrast ratio enhancement method, the FO:FO contrast ratio can be improved from 839:1 to 48250:1, the ANSI contrast ratio can be improved from 174:1 to 306:1, while the image system efficiency remains at 76.2%. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT070158131 http://hdl.handle.net/11536/75666 |
显示于类别: | Thesis |