【摘要】 传统的UHP灯已不能满足微型投影系统的照明需要.利用LED鲜明的优越性设计了包括椭球反光器、LED组合、锥形光管等器件的DMD微型投影仪照明系统,使之满足某些投影设备对亮度要求不高,但结构紧凑、性能稳定、使用受命长的要求.实现输出光源的均匀照明,同时使得输出光线近似地变为平行光汇聚到DMD芯片上,发散角为20°左右.利用TracePro软件模拟分析表明,系统光能利用率达到60%以上,DMD芯片上光场均匀性可以达到90%以上,满足微型投影系统的的需要.更多还原

【Abstract】 Traditional UHP lamp had not been met for micro projection system need.An illumination system based LEDs for micro-projection system.It was made up of many LEDs,ellipsoidal reflector,taper light pipe and lens.LEDs are located on the left focal point of the ellipsoidal reflector,and the microstome of the taper light pipe located on right local plane of the ellipsoidal reflector.Angle of divergence of exit rays is about 20°.Ex- perimental results analyzed by TracePro software show that the proposed LED illumination system achieved higher uniformity at 90% and better energy efficiency 60%,and the designed system is simple and easy to come true.更多还原