作者
Ming-Jui Chen, Hien-Thanh Le, Lanh-Thanh Le, Wei-Hsiung Tseng, Wei-Yang Lee, Si-Yuan Chen, Sheng-Yen Chen, Hsing-Yuan Liao, Yung-Cheng Li, Hsiao-Yi Lee
发表日期
2020
期刊
International Journal of Optics
卷号
2020
期号
1
页码范围
6145638
出版商
Hindawi
简介
To enhance driving safety, a counter beam light is proposed to meet CIE (International Commission on Illumination) specifications for tunnel lighting. The proposed new counter beam light (CBL) acts as a qualified counter beam light to help tunnel road lighting meet the CIE 88 : 2004 regulation standard in the threshold zone in both simulation and in practice. Through appropriate arrangements of the counter beam light and conventional fluorescent lights on the tunnel ceiling, we demonstrate that road tunnel lighting meeting CIE 88 : 2004 standards can be accomplished. Based on LiteStar four‐dimensional simulation, the source file created through the measurement of the proposed CBL prototype achieved an average road surface brightness of 121 cd/m2, which is greater than the minimum regulation level of 105 cd/m2, a brightness uniformity of 0.88 (minimum regulation level of 0.4), longitudinal brightness …
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MJ Chen, HT Le, LT Le, WH Tseng, WY Lee, SY Chen… - International Journal of Optics, 2020