Compact illumination optic with three freeform surfaces for improved beam control

Simone Sorgato, Ruben Mohedano, Julio Chaves, Maikel Hernandez, Jose Blen, Dejan Grabovickic, Pablo Benitez, Jc Minano, Hugo Thienpont, Fabian Duerr

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

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
Original languageEnglish
Pages (from-to)29627-29641
Number of pages15
JournalOpt. Express
Volume25
Issue number24
DOIs
Publication statusPublished - 27 Nov 2017

Keywords

  • NON-LAMBERTIAN SOURCES
  • ASPHERICAL LENSES
  • DIRECT DESIGN
  • GEOMETRY

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