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Microstructure Optics Designed for LED Traffic Signal Lighting

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Abstract:

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.

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Periodical:

Key Engineering Materials (Volumes 364-366)

Pages:

493-498

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.364-366.493

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Online since:

December 2007

Authors:

Lo Ming Fok, Min Hang Pun, Derek Louie, Li Man Li

Keywords:

Light Emitting Diode (LED), Microstructure Optics Design, Microstructure Optics Manufacturing, Traffic Signal Lights

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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References

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

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