Open AccessCompact illumination optic with three freeform surfaces for improved beam control
Author(s) -
Simone Sorgato,
Rubén Mohedano,
Julio Chaves,
Marta I. Hernández,
José Blen,
Dejan Grabovičkić,
Pablo Benı́tez,
Juan C. Miñano,
Hugo Thienpont,
Fabian Duerr
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.029627
Subject(s) - wavefront , optics , nonimaging optics , computer science , light intensity , light emitting diode , enhanced data rates for gsm evolution , coupling (piping) , materials science , physics , artificial intelligence , metallurgy
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 (SMS) 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.