This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Strategies for Optimizing Headlamp Illumination and Visibility Along Curves
Technical Paper
2006-01-0489
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A field study to measure peripheral visual performance under various headlamp conditions typical of halogen and high intensity discharge (HID) headlamps and including functions that could be incorporated in advanced forward-lighting systems (AFS), was conducted. The study simulated an approach of left- and right-hand turns. Targets of varying size were located at different locations along the edges of the curves, and different headlamp illumination conditions were used. Reaction times and missed targets were measured. The results were consistent with previously published studies showing a benefit of increased peripheral illumination commonly found in HID headlamps and with AFS systems on peripheral target detection. Perhaps more importantly, these data could be used to make predictions of peripheral visibility under arbitrary beam patterns as a function of target characteristics and headlamp intensity, and could help identify locations within beam patterns where increased illumination is likely to be beneficial when entering curves, and where it is not likely to benefit. The findings of the present study are consistent with the findings of visual benefits with HID headlamps in earlier studies, in that the configuration with illuminance conditions most representative of HID headlamps resulted in improved target detection for targets located along a curve, over the configuration most closely matching the illuminance profile of halogen headlamps. Incorporating AFS functionality could result in greater improvements, but increased illumination has diminishing returns once an asymptotic level of visual performance is attained.
Recommended Content
Authors
Citation
Bullough, J., Van Derlofske, J., and Akashi, Y., "Strategies for Optimizing Headlamp Illumination and Visibility Along Curves," SAE Technical Paper 2006-01-0489, 2006, https://doi.org/10.4271/2006-01-0489.Also In
Automotive Lighting Technology & Human Factors in Driver Vision & Lighting; Rear Vision & Indirect Vision
Number: SP-1993; Published: 2006-04-03
Number: SP-1993; Published: 2006-04-03
SAE 2006 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V115-6; Published: 2007-03-30
Number: V115-6; Published: 2007-03-30
References
- Akashi Y Van Derlofske J Bullough JD 2005 Recommendations for dimming headlamps through AFS ISAL 2005 Proceedings Darmstadt University of Technology Germany September 27–28
- Bullough JD. 2002 Modeling peripheral visibility under headlamp illumination TRB 16th Symp. on Vis., Iowa City, IA June 2–4 Iowa City, IA University of Iowa
- Bullough JD Van Derlofske J 2004 Headlamp illumination and glare: An approach to predicting peripheral visibility (SAE paper 2004-01-1094 ). SAE 2004 World Cong.s, Detroit, MI March 8–11
- Hamm M Steinhart R 1999 Xenon light and its impact on traffic safety aspects Proc. PAL 1999 Symposium Darmstadt Progress in Automotive Lighting
- Jost K. 1995 Anatomy of high intensity discharge headlamps Automotive Eng. Nov. 38
- Rea MS Ouellette MJ 1991 Relative visual performance: A basis for application Lighting Res. Technol. 23
- Sullivan JM Flannagan MJ 1999 Assessing the Potential Benefit of Adaptive Headlighting Using Crash Databases , UMTRI 99-21. Ann Arbor University of Michigan
- Van Derlofske J Bullough JD Hunter CM 2001 Evaluation of high-intensity discharge automotive forward lighting (SAE paper 2001-01-0298 ). SAE 2001 World Cong., Detroit, MI March 5–8
- Van Derlofske J Bullough JD Hunter CM 2002 Visual benefits of high-intensity discharge forward lighting (SAE paper 2002-01-0259 ). SAE 2002 World Cong., Detroit, MI March 4–7