摘要
提出了一种新型离轴照明系统,它由一个半球—椭球型反射镜、一个双曲面反射镜和一个倾斜的匀光杆组成。半球—椭球型反光镜收集灯弧发出光能,双曲面反光镜将光束再次聚焦到匀光杆的前端面。用LightTools软件建模的结果显示,当光调制器尺寸为1.4或1.3m时,在满足高均匀性的前提下,光收集率能够提高20%。
A novel off-axis illumination system has been developed to collect and focus light from an arc lamp onto the imager. The system consists of a sphere-ellipsoidal reflector, a hyperboloidal reflector and a tilted light pipe. The sphere-ellipsoidal reflector synthesizes two main light beams and focuses the light to reduce the entendue value. The hyperboloidal reflector transforms the shape of beam into a tilted light pipe to gain high collection efficiency and uniformity. The modeling result obtained by LightTools and ZEMAX shows that the system can illuminate the small imagers with high uniformity and collection efficiency.
出处
《红外与激光工程》
EI
CSCD
北大核心
2004年第3期316-319,共4页
Infrared and Laser Engineering
