UV-reflecting layer, lamp with such a layer, and method of...

Details UV-reflecting layer, lamp with such a layer, and method of... UV-reflecting layer, lamp with such a layer, and method of...

2005-06-14

2005-06-14

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

C313S112000, C313S113000

Reexamination Certificate

active

06906463

ABSTRACT:
In an UV-reflecting layer for discharge lamps, the layer comprises at least 0.1% by weight of Al2O3and at least 0.1% by weight of a material having a higher refractive index than Al2O3, so that as large a proportion of UV light as possible can be reflected and as large a portion of visible light as possible can be emitted by the lamp.

REFERENCES:
patent: 3995192 (1976-11-01), Hammer
patent: 4289991 (1981-09-01), Schreurs
patent: 4521524 (1985-06-01), Yamashita
patent: 5258689 (1993-11-01), Jansma et al.
patent: 5619096 (1997-04-01), Kaliszewski et al.
patent: 5811924 (1998-09-01), Okumura et al.
patent: 5817160 (1998-10-01), Nagpal et al.
patent: 6281625 (2001-08-01), Tachibana et al.
patent: 6323585 (2001-11-01), Crane et al.

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