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Proceedings Paper

Free-form integrator array optics
Author(s): J. C. Miñano; M. Hernández; P. Benítez; J. Blen; O. Dross; R. Mohedano; A. Santamaría
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Paper Abstract

A new design method of free-form Kohler integrator array optics is presented. Only few solutions to the integrator design problem are known, which apply for specific and simple source and targets (for instance, flat integrator lenslet arrays when the source and target are squares located at infinity). The method presented here find more general solutions and the resulting optics is formed by two arrays of free-form optical surfaces (which can be either reflective of refractive). The contour curves of the array units are also obtained from the design. Two types of Kholer integrators will be defined, depending if they integrate only along one direction across the source (one-directional integrators) or in the two directions (two-directional integrators). This design method has been applied for an ultra-compact high efficiency LED low beam head lamp producing a legal pattern independently of the chip luminance variation and permitting LED position tolerances of ±200 microns. The ray tracing proves that the high gradient (0.32) and its vertical position in the pattern remain invariable when chip is moved.

Paper Details

Date Published: 2 September 2005
PDF: 12 pages
Proc. SPIE 5942, Nonimaging Optics and Efficient Illumination Systems II, 59420C (2 September 2005); doi: 10.1117/12.620240
Show Author Affiliations
J. C. Miñano, Light Prescriptions Innovators LLC (United States)
Technical Univ. of Madrid (Spain)
M. Hernández, Technical Univ. of Madrid (Spain)
P. Benítez, Light Prescriptions Innovators LLC (United States)
Technical Univ. of Madrid (Spain)
J. Blen, Technical Univ. of Madrid (Spain)
O. Dross, Light Prescriptions Innovators Europe (Spain)
R. Mohedano, Light Prescriptions Innovators Europe (Spain)
A. Santamaría, Technical Univ. of Madrid (Spain)

Published in SPIE Proceedings Vol. 5942:
Nonimaging Optics and Efficient Illumination Systems II
Roland Winston; R. John Koshel, Editor(s)

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