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A Study on Peripheral Visibility under Different Headlamp Low-beam Pattern

Wencheng CHEN, Yandan LIN, Shinichi KOJIMA, Dahua CHEN
2008 Journal of light & visual environment  

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In this article peripheral visibility under the condition of three types of head]amps' Iow-beam pattern was compared with the Two-Alternative Forced-Choice (2AFC) method. The three headlamps used in this night-time e]d stvdy were headlamp No. 1: Parabolic-HID, Headlarnp N0.2i Projector-HID 8nd Headlarnp N0.3: Parabolic-Halogen. The results show that HID headlamps are better for the detection of pedestrian in periphera] than halogen headlamps because of the higher light output, higher color
more » ... ratvre, brighter foreground and wider spread of light. Some suggestion abovt criteria of the automobi]e head]ight distribvtion for Chinese traffic condition was also discussed.
doi:10.2150/jlve.32.358 fatcat:k2g477nn3zehnbk3lflnopy34e
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Wencheng CHEN, Yandan LIN, Shinichi KOJIMA, Dahua CHEN. "A Study on Peripheral Visibility under Different Headlamp Low-beam Pattern." Journal of light & visual environment 32.4 (2008) 358-365