摘要
根据非成像光学理论,从能量传递的角度分析了发光二极管(LED)抛物反射器几何参数与LED绕垂直于光线传播方向轴旋转角度对能量收集率的影响,建立了统一的抛物反射器的光能利用率与几何参数及LED旋转角度的解析表达式。分析结果表明,利用光学扩展量来评价LED抛物反射器的能量收集率是合理的;通过旋转LED光源,可进一步提高光能收集率,抛物反射器的几何参数不同,其最佳的旋转角度也不同。仿真模拟结果与理论分析结论基本一致。
Based on the theory of non-imaging optics,the geometric parameters of light-emitting diode（LED） parabolic reflector and the impact of rotation angle of LED around the axis which is perpendicular to propagation direction on the efficiency of light collection are analysed in energy transfer aspect,and eventually unified closed relationships between efficiency of light collection of a parabolic reflector with the geometric parameters and the rotation angle are established.The results show that using étendue to evaluate the efficiency of energy collection of LED parabolic reflector is reasonable,and rotating the LED can further improve the efficiency,and for each different sets of geometric parameters,the best rotation angle is different.The simulation results are according with the theoretical analysis.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2010年第3期680-684,共5页
Chinese Journal of Lasers
基金
浙江省自然科学基金(Y104436)
浙江省科技计划(2008C21158)资助课题
