Abstract:

A plano-convex freeform surface algorithm is presented for uniform illumination.The 3D modeling of the lens is performed based on non-imaging optical core theory of etendue and energy conservation,according to Snell's law,by the establishment of a lens profile curve ODE satisfied by using Matlab in the DDE (Dynamic Transmission) technology and Tracepro complete language in the scheme of dynamic data link,eliminating the need to import 3d software brings curve fitting error,so the modeling becomes more accurate.The results show that the algorithm can achieve uniform illumination in a specific area with a lens diameter of 23 mm and an optical efficiency of up to 51.99% with the light source 10 mm from the lens.

Key words: optic design;uniform illumination;secondary light;plano convex lens;LED