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Proceedings Paper

Tailored Fresnel optics II: the facets
Author(s): Ralf Leutz; Harald Ries
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Paper Abstract

Snell's law allows to find the slope of an optical surface needed to redirect a given incoming ray into a given outgoing ray. Since a prism comprises two surfaces the problem of redirecting one ray with a prism is underdetermined. In a range of situations it is possible to determine a prism such as to simultaneously match two given incoming rays into two given output rays. This allows to tailor 2D Fresnel optics for finite sources and targets. If source and target subtend equal angles as seen from the Fresnel lens, then the facets are symmetric resembling the minimum deviation configuration, which also minimizes chromatic aberration based an the dispersion in the material of the lens.

Paper Details

Date Published: 12 November 2003
PDF: 7 pages
Proc. SPIE 5186, Design of Efficient Illumination Systems, (12 November 2003); doi: 10.1117/12.506818
Show Author Affiliations
Ralf Leutz, Philipps-Univ. Marburg (Germany)
Harald Ries, Philipps-Univ. Marburg (Germany)
Optics and Energy Concepts AG (Germany)


Published in SPIE Proceedings Vol. 5186:
Design of Efficient Illumination Systems
R. John Koshel, Editor(s)

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