HIGH EFFICIENCY GLASS HALOGEN LAMP WITH INTERFERENCE COATING

The disclosure provides a light-transmissive glass halogen filament tube with a filament light source having a coil concentricity ratio of not greater than 20% disposed therein, the filament tube having a multi-layer optical interference coating deposited on the outer surface thereof that transmits...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: CHOWDHURY ASHFAQUL ISLAM, HOEGLER LEONARD EDWARD, WRIGHT WILLIAM ROBERT
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:The disclosure provides a light-transmissive glass halogen filament tube with a filament light source having a coil concentricity ratio of not greater than 20% disposed therein, the filament tube having a multi-layer optical interference coating deposited on the outer surface thereof that transmits visible radiation from about 400-750 nm and reflects infra red radiation from about 800-2500 nm back to the filament for re-absorption, the coated filament tube exhibiting an LPW gain of at least 26%.