Metal halide arc discharge lamp for projection purposes

A metal halide discharge lamp, for projection purposes, has a translucent discharge vessel which contains two opposed electrodes connected to externally extending leads and which contains an ionisable filling of mercury, one or more noble gases, one or more halogens, caesium, a rare earth metal and...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	GENZ, ANDREAS., 12159 BERLIN, DE, DIRKS, JOACHIM., 13351 BERLIN, DE, GOELLING, HANS-WERNER, 10625 BERLIN, DE, BARTHELMES, CLEMENS, 13591 BERLIN, DE
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY
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Beschreibung
Zusammenfassung:	A metal halide discharge lamp, for projection purposes, has a translucent discharge vessel which contains two opposed electrodes connected to externally extending leads and which contains an ionisable filling of mercury, one or more noble gases, one or more halogens, caesium, a rare earth metal and a further metal for forming metal halides. The novelty is that the further metal is niobium pref. present in amount 0.3-3 (esp. 1.0-1.5) micro-moles per cm of vessel vol.