Design of compact and smooth free-form optical system with uniform illuminance for LED source | Zendy

Yi Luo | Zendy; Zexin Feng | Zendy; Yanjun Han | Zendy; Hongtao Li | Zendy

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Design of compact and smooth free-form optical system with uniform illuminance for LED source

Author(s) -

Yi Luo,

Zexin Feng,

Yanjun Han,

Hongtao Li

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.009055

Subject(s) - illuminance , optics , lens (geology) , nonimaging optics , light source , led lamp , point source , computer science , physics

A feedback modification method based on variable separation mapping is proposed in the design of free-form optical system with uniform illuminance for LED source. In this method, the non-negligible size of LED source is taken into account, and a smooth optical system is established with single freeform surface regenerated by adding feedback to the lens design for a point light source. More rounds of feedback can improve the lens performance. As an example, a smooth free-form lens with rectangular illuminance distribution is designed, and the illuminance uniformity is improved from 18.75% to 81.08% after eight times feedback.

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