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Quantitative evaluation research of glare from automotive headlamps
Author(s): Tiecheng Wang; Rui Qian; Ye Cao; Mingqiu Gao
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Paper Abstract

This study concerns the quantized evaluation research of glare from automotive headlamps. In the actual regulations, only one point in the test screen is set for judging whether driver can bear the light caused by headlamps of opposing vehicle. To evaluating practical effect of glare, we accept a glare zone with the probability distribution information of the oncoming driver’s eye position. In this focus area, glare level of headlamp is represented by weighted luminous flux. To confirm the most comfortable illuminance value to human eyes at 50 m, we used test point B50L as observation position, and collected 1,000 subjective evaluation data from 20 test personnel in different ages during two months. Basing on the assessment results, we calculated 0.60 lx as recommended value for standardized testing procedure at 25 m. Then we figured out 0.38 lm as optimum value, and 0.25 / 1.20 lm as limiting values depending on regulations. We tested 40 sample vehicles with different levels to verify the sectional nonlinear quantitative evaluation method we designed, and analyzed the typical test results.

Paper Details

Date Published: 12 January 2018
PDF: 9 pages
Proc. SPIE 10621, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 106211Y (12 January 2018); doi: 10.1117/12.2295537
Show Author Affiliations
Tiecheng Wang, Tianjin Univ. (China)
China Automotive Technology and Research Ctr. (China)
Rui Qian, China Autmotive Technology and Research Ctr. (China)
Ye Cao, China Autmotive Technology and Research Ctr. (China)
Mingqiu Gao, China Autmotive Technology and Research Ctr. (China)


Published in SPIE Proceedings Vol. 10621:
2017 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems
Jigui Zhu; Hwa-Yaw Tam; Kexin Xu; Hai Xiao; Liquan Dong, Editor(s)

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