Analysis for optical extend in light-pipe illumination system
-
摘要: 为优化方棒照明系统的整体性能,基于非成像光学的光学扩展量,对方棒尺寸与后继光学系统进行匹配,分析了光学扩展量经方棒传递后的变化.理论分析和实验表明方棒的截面尺寸与入射光斑的半径在一定比率时系统具有最大光能利用率,在理想情况下方棒截面高度与入射光斑半径的最佳比率为1.535,实际系统中该比率需适当修正.据此,提出了限制光斑进入方棒以提高整体照明系统效率的方法.Abstract: Based on optical extend, non-imaging optics was used to optimize the light-pipe lighting system. The transfer of optical extend in light-pipe was analyzed. The detailed analysis and experiment show that a balance between the section size of the light-pipe and the F number of the light beam should be reached to acquire best performance. Theoretically the optimal ratio of the height of the light-pipe to the radius of the light beam is 1.535, it will change slightly in the different systems. So a new method to limit the facula was presented to improve illumination efficiency of light-pipe.
-
Key words:
- optics /
- lighting system /
- efficiency /
- light-pipe /
- optical extend
-
[1] Beniamin A J, Robert D G. Beam-shape transforming devices in high-efficiency projection system [J]. SPIE, 1996, 2407:48~56 [2]David A. Design issues in liquid-crystal projection displays [J].SPIE,1996, 2650:41~51 [3]Brennesholtz M S. Light collection efficiency for light valve projection systems [J].SPIE,1996,2650:71~79 [4]Stupp E H, Brenneshcltz M S. Projection displays [M]London:John Wiley & Sons Ltd, 1999. 121~122,244 [5]Welford W T, Winston R H. Collection nonimaging optics [M]. New York:Academic, 1989.35~39 [6] Winston R. Nonimaging optics[M].New York:Sci Am,1991.26~81 -
点击查看大图
计量
- 文章访问数: 1016
- HTML全文浏览量: 255
- PDF下载量: 34
- 被引次数: 0
下载:
