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Investigation into the effects of Absorptive and Interference Coatings Applied on Replaceable Headlamp Bulbs
Technical Paper
2004-01-0802
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This report investigates the use of single and multi-layer coatings on replaceable headlamp bulbs and how such coatings can affect the performance of bulbs in terms of light scattering, which can contribute to glare, and spectral separation in headlamps. Tests were developed to investigate the effects of absorptive and interference (multi-layer) coatings on bulbs, and on bulbs in headlamp systems. These tests provide validation for a proposed bulb color separation test, which establishes limits for spectral separation within the boundaries of SAE J578 white color requirements. The bulb color separation test provides a definitive selection criterion to identify bulbs that cause excessive light scatter (glare) and/or spectral separation in an optical system.
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Authors
Citation
Bucher, K., Holt, D., King, G., Lüttgens, G. et al., "Investigation into the effects of Absorptive and Interference Coatings Applied on Replaceable Headlamp Bulbs," SAE Technical Paper 2004-01-0802, 2004, https://doi.org/10.4271/2004-01-0802.Also In
SAE 2004 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V113-6; Published: 2005-07-05
Number: V113-6; Published: 2005-07-05
References
- Tessnow, T. Reiners, T. Hering, O. “Optical Near Field Measurements and Ray-Tracing Simulation of Coated and Uncoated Halogen Lamps for Glare Analysis” SAE technical publication, SP-1787, # 2003-01-0929 Society of Automotive Engineers Warrendale, PA 2003
- http://www.unece.org/trans/main/wp29/wp29regs.html
- SAE Standard J578 “Color Specification” Society of Automotive Engineers Warrendale, PA 2002
- “Method for Computing the Colors of Objects by Using the CIE System” American National Standards Institute, Inc. 11 West 42nd Street, New York, NY 10036-8002
- FMVSS (Federal Motor Vehicle Safety Standards) 1998 “Lamps, reflective devices, and associated equipment” Code of Federal Regulations, 49CFR571 Washington, D.C.
- Terburg, B.P. et al. “Review of color coated bulb test methods and data” United Nations Economic Commission for Europe's Working Party on Lighting and Light Signaling 2000
- http://www.unece.org/trans/main/wp29/wp29regs.html
- http://www.unece.org/trans/main/wp29/wp29regs.html