Title :
Color shift of head lamps for automotive lighting over lifetime
Author :
Kettlitz, M. ; Krylova, O. ; Ehrlichmann, D. ; Gunther, K. ; Vollmer, L.
Author_Institution :
INP, Greifswald
Abstract :
The color shift of head lamps for automotive lighting over lifetime was investigated. For that purpose a combination of emission spectroscopy and thermography was used to determine spectra, color data and the cold-spot temperature. There are changes in the lamp behavior over lifetime with a visible blue shift until 500 h and a reversal afterwards. The cold-spot temperature is nearly constant until 1000 h and then increases slowly. The different behavior of Sc und Na partial pressure with increasing lifetime leads to a change of the spectral output of the lamp and therefore of the color appearance over lifetime
Keywords :
automotive electronics; infrared imaging; lamps; scandium; sodium; spectral line shift; Na; Sc; automotive lighting; blue shift; cold-spot temperature; color appearance; color data; color shift; emission spectroscopy; head lamps; light sources; plasma diagnostics; spectral output; thermography; Automotive engineering; Lamps; Mercury (metals); Phase measurement; Plasma diagnostics; Plasma measurements; Plasma temperature; Spectroscopy; Temperature distribution; Temperature measurement; light sources; plasma diagnostics;
Conference_Titel :
Industry Applications Conference, 2006. 41st IAS Annual Meeting. Conference Record of the 2006 IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
1-4244-0364-2
Electronic_ISBN :
0197-2618
DOI :
10.1109/IAS.2006.256778
