摘要
为了提高DLP投影照明系统中准直部分的准直度并简化准直光路,采用一种自由曲面的TIR透镜作为DLP投影照明系统的准直器件。首先根据空间斯涅耳定律推导出反射曲面以及透射曲面母线上的点的坐标关系,并采用迭代的方法使用Matlab软件计算出母线上各个点的坐标并绘制出曲线图形,然后利用Pro/Engineer对TIR准直透镜进行建模得到TIR准直透镜的模型。分别用理想点光源和扩展光源进行模拟,经过TIR透镜准直后光束发散角在±7°以内,并根据选用的DMD芯片和LED光源选择合适的TIR透镜参数,建立DLP投影照明系统后进行模拟仿真,最终均匀度达到了90%,满足了投影照明系统的需求。
In order to improve the collimation efficiency of illumination system of DLP projector and simplify the optical path, a free-form TIR lens is used as the collimating component. The coordinates of profile curve of the transmitting part and total reflecting part are calculated by Matlab according to the Snell＇s law and iterative method at first. Then the TIR lens model is established with Pro/E. The ideal point source and surface source are also used to do the simulation. The view angle is collimated to ±7°by the TIR lens. Finally, the suitable parameter of TIR lens is set according to DMD chip and LED source. The final uniformity of DLP illumination is about 90%, which can meet the related standard.
出处
《红外技术》
CSCD
北大核心
2015年第7期582-587,共6页
Infrared Technology
基金
国家专项基金项目
编号:61027014
深圳市科技计划项目
编号:JCYJ20140418095735582
关键词
自由曲面
DLP
投影照明
准直透镜
光学设计
free-form surface, DLP, projector illumination, collimating lens, optical design
