Light emitting diodes are routinely used for general and specialized lighting tasks such as streetlights,luminaires,auto......

在理论上，全内反射透镜可对所有光线进行收集，因而是远距离准直照明系统二次光学设计的首选结构。利用光学软件进行仿真和实验测试，分......

　　A local feedback modification method is proposed to design optical freeform surface for extended source.With the gen......