Optimization of freeform lightpipes for light-emitting-diode projectors

    Authors

    F. Fournier;J. Rolland

    Comments

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    Abbreviated Journal Title

    Appl. Optics

    Keywords

    Optics

    Abstract

    Standard nonimaging components used to collect and integrate light in light-emitting-diode-based projector light engines such as tapered rods and compound parabolic concentrators are compared to optimized freeform shapes in terms of transmission efficiency and spatial uniformity. We show that the simultaneous optimization of the output surface and the profile shape yields transmission efficiency within the etendue limit up to 90% and spatial uniformity higher than 95%, even for compact sizes. The optimization process involves a manual study of the trends for different shapes and the use of an optimization algorithm to further improve the performance of the freeform lightpipe. (C) 2008 Optical Society of America.

    Journal Title

    Applied Optics

    Volume

    47

    Issue/Number

    7

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    957

    Last Page

    966

    WOS Identifier

    WOS:000254674000012

    ISSN

    1559-128X

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