Compact illumination optic with three freeform surfaces for improved beam control

Multi-chip and large size LEDs dominate the lighting market in developed countries these days. Nevertheless, a general optical design method to create prescribed intensity patterns for this type of extended sources does not exist. We present a design strategy in which the source and the target pattern are described by means of "edge wavefronts" of the system. The goal is then finding an optic coupling these wavefronts, which in the current work is a monolithic part comprising up to three freeform surfaces calculated with the Simultaneous Multiple Surface method. The resulting optic fully controls, for the first time, three freeform wavefronts, one more than previous SMS designs. Simulations with extended LEDs demonstrate improved intensity tailoring capabilities, confirming the effectiveness of our method and suggesting that enhanced performance features can be achieved by controlling additional wavefronts. (C) 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Jaar van publicatie:2017

Trefwoorden:NON-LAMBERTIAN SOURCES, ASPHERICAL LENSES, DIRECT DESIGN, GEOMETRY

CSS-citation score:2

Auteurs:Regional

Toegankelijkheid:Open