SAE J 2739:2011-02-24

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.

Author	SAE
Editor	SAE
Document type	Standard
Format	File
ICS	29.140.20 : Incandescent lamps 43.040.20 : Lighting, signalling and warning devices 87.040 : Paints and varnishes
Number of pages	29
Replace	SAE J 2739:2007-01-30
Set	JPAKS10U-10
Year	2011
Document history	SAE J 2739:2007-01-30
Country	USA
Keyword	SAE 2739;SAE J2739;SAE J2739;SAE J 2739