说明：  matlab 在led二次光学设计中的数值计算例程，不是原创，不过很有参考价值.
(LED the secondary optical lens design in the design, according to the principle of nonimaging optics, using matlab to generate two-dimensional point coordinates, can be introduced into 3 d modeling software, production model.Code has been tested, can be successful completion of the calculation.You can refer to it)