Microstructure Optics Designed for LED Traffic Signal Lighting

Abstract:

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Optical lenses are used in signal lighting to control intensity distributions. Brightness and viewing angle are two essential requirements that have to be considered in manufacturing a traffic signal lamp. This paper discusses design considerations for microstructure optics designed for LED traffic signal light, strategies for obtaining particular intensity distributions, optical functions of the lens and matters concerning the manufacturing process. The mould inserts of the optical surfaces were machined by CNC high-speed milling. Results of surface finish and profile accuracy analyses using the Form Talysurf instrument are presented.

Info:

Periodical:

Key Engineering Materials (Volumes 364-366)

Edited by:

Guo Fan JIN, Wing Bun LEE, Chi Fai CHEUNG and Suet TO

Pages:

493-498

Citation:

L. M. Fok et al., "Microstructure Optics Designed for LED Traffic Signal Lighting ", Key Engineering Materials, Vols. 364-366, pp. 493-498, 2008

Online since:

December 2007

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Price:

$38.00

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[2] S. Irving, U.S. Patent 362, 878. (2001).

[3] British Standard BS EN 12368: 2000 in: Traffic Control Equipment - Signal Head, Publications/ European Committee For Standarization (2000).

[4] W. Welford and R. Winston in: High collection Nonimaging Optics, Publishing, Academic Press, New York (1989).