High-pressure discharge lamp for vehicle headlights
AssigneePatent-Treuhand-Gesellschaft für elektrishe Glūhlampen mbH
InventorsDirk Grundmann, Conrad Schimke
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Abstract
The invention relates to a mercury-free high-pressure discharge lamp for use in a vehicle headlight. The ionizable filling of the high-pressure discharge lamp according to the invention comprises exclusively xenon and the halides of the metals sodium, scandium, indium and zinc.
Claims6
A high-pressure discharge lamp for vehicle headlights having a discharge vessel, which is sealed in a gas-tight manner, and in which are arranged two electrodes and an ionizable filling for producing a gas discharge, wherein the ionizable filling comprises xenon and halides of the metals sodium, scandium, indium and zinc,
- the concentration of sodium iodide ranges from 0.0083 to 0.0109 mg/mm3;
- the concentration of scandium iodide ranges from 0.0060 to 0.0078 mg/mm3;
- the concentration of zinc iodide ranges from 0.0010 to 0.0013 mg/mm3;
- and
- the concentration of indium iodide is about 0.000 1 mg/mm3.
Dependencies are inferred from the claim text.