Algorithm for irradiance tailoring using multiple freeform optical surfaces.
The design of freeform lenses and reflectors allows to achieve non-radially symmetric irradiance distributions whilst keeping the optical system compact. In the case of a point-like source, such as an LED, it is often desired to capture a wide angle of source light in order to increase optical efficiency. This generally results in strongly curved optics, requiring both lens surfaces to contribute to the total ray refraction, and thereby minimising Fresnel losses. In this article, we report on a new design algorithm for multiple freeform optical surfaces based on the theory of optimal mass transport that adresses these requirements and give an example of its application to a problem in general lighting.
Chair for the Technology of Optical Systems, RWTH Aachen University, 52056 Aachen, Germany.
Axel
A
Bäuerle
Adrien
A
Bruneton
Rolf
R
Wester
Jochen
J
Stollenwerk
Peter
P
Loosen
D000465:Algorithms; D008027:Light; D010783:Photometry / Q000379:methods*; D012542:Scattering, Radiation