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    Catadioptric freeform optical system design for LED off-axis road illumination applications

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    Author
    Zhu, Zhengbo
    Ma, Donglin
    Hu, Qiaomu
    Tang, Yongqian
    Liang, Rongguang
    Affiliation
    Univ Arizona, Coll Opt Sci
    Issue Date
    2017-12-04
    
    Metadata
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    Publisher
    OPTICAL SOC AMER
    Citation
    Catadioptric freeform optical system design for LED off-axis road illumination applications 2017, 26 (2):A54 Optics Express
    Journal
    Optics Express
    Rights
    © 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    The aim of this paper is to develop a new composite structure of catadioptric optical system containing both freeform refractive surface and freeform total internal reflective (TIR) surface for LED road illumination applications. The role of freeform refractive part is to generate the shifted general rectangular illumination pattern to optimally match the shape of the road surface. The application of TIR mechanism is aimed to control the stray light in the sidewalk direction of the road luminaire and maximize the efficient energy efficiency. In this paper, we use the "double pole" ray mapping technique to design the refractive optical surface and the theta-phi coordinate ray mapping technique to derive the freeform TIR surface. The simulation shows that the novel catadioptric design has relatively high collection efficiency, thus high average illuminance level inside the effective illumination area. This lens also has good control of stray light on the backside of the road luminaire. (c) 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
    Note
    Open access journal.
    ISSN
    1094-4087
    DOI
    10.1364/OE.26.000A54
    Version
    Final published version
    Sponsors
    Wuhan Science and Technology Bureau [2017010201010110]; Huazhong University of Science and Technology [2017KFYXJJ026]
    Additional Links
    https://www.osapublishing.org/abstract.cfm?URI=oe-26-2-A54
    ae974a485f413a2113503eed53cd6c53
    10.1364/OE.26.000A54
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