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High resolution irradiance tailoring using multiple freeform surfaces

: Bruneton, A.; Bäuerle, A.; Wester, R.; Stollenwerk, J.; Loosen, P.

Volltext urn:nbn:de:0011-n-2388206 (886 KByte PDF)
MD5 Fingerprint: c337b8f78e03c59a5bb37a94437d0738
Erstellt am: 3.5.2013

Optics Express 21 (2013), Nr.9, S.10563-10571
ISSN: 1094-4087
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer ILT ()

More and more lighting applications require the design of dedicated optics to achieve a given radiant intensity or irradiance distribution. Freeform optics has the advantage of providing such a functionality with a compact design. It was previously demonstrated in [Bäuerle et al., Opt. Exp. 20, 14477-14485 (2012)] that the up-front computation of the light path through the optical system (ray mapping) provides a satisfactory approximation to the problem, and allows the design of multiple freeform surfaces in transmission or in reflection. This article presents one natural extension of this work by introducing an efficient optimization procedure based on the physics of the system. The procedure allows the design of multiple freeform surfaces and can render high resolution irradiance patterns, as demonstrated by several examples, in particular by a lens made of two freeform surfaces projecting a high resolution logo (530 × 160 pixels).