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High power medium pressure mercury containing lamps used as UV sources for curing of varnish and for water purification are investigated. The intention of the work is to characterize non-stable states of lamp operation with respect to an electronic operation. For that purpose a combination of emission spectroscopy and thermography is used to determine spectra, plasma parameters and the lamp temperature...
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...
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