Design of a bike headlamp based on a power white-light-emitting diode

In this letter, we present a new design for a light-emitting diode- based bike headlamp. The optical design contains two horizontal reflectors and a light pipe with two horizontal parallel mirrors. The designed illumination pattern in our simulations performs a contrast of 250 in the K-mark regulati...

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Bibliographic Details
Published in:Optical Engineering 2011-08, Vol.50 (8), p.080503-080503
Main Authors: Lo, Yi-Chien, Chen, Cheng-Chien, Chou, Hung-Yu, Yang, Kai-Yu, Sun, Ching-Cherng
Format: Article
Language:English
Subjects:
Control
Diodes
Headlamps
Horizontal
Illumination
Optical design
Reflectors
Simulation
Online Access:Get full text
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Summary:In this letter, we present a new design for a light-emitting diode- based bike headlamp. The optical design contains two horizontal reflectors and a light pipe with two horizontal parallel mirrors. The designed illumination pattern in our simulations performs a contrast of 250 in the K-mark regulation, and it was measured to be 21 in the experiment with a not well-finished prototype, which was operated at 1 W. The contrast is higher than 5 as requested in the regulation.
ISSN:0091-3286
1560-2303
1560-2303
DOI:10.1117/1.3615278