Metal halide lamp with improved red rendition and CRI

Details Metal halide lamp with improved red rendition and CRI Metal halide lamp with improved red rendition and CRI

2005-10-25

2005-10-25

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

C313S493000, C313S634000

Reexamination Certificate

active

06958575

ABSTRACT:
A ceramic metal halide arc tube is surrounded by a protective neodymium sleeve supported by a metal frame. As a result of the neodymium sleeve, the lamp is observed to have improved transmission of red color and to exhibit a CRI of at least about 90.

REFERENCES:
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patent: 5961208 (1999-10-01), Karpen
patent: 6136736 (2000-10-01), Rajaram et al.
patent: 6157131 (2000-12-01), Nelson et al.
patent: 6294871 (2001-09-01), Scott et al.
patent: 6329742 (2001-12-01), Nelson et al.
patent: 05094804 (1993-04-01), None
patent: 1174905 (2002-01-01), None
patent: WO0011704 (2000-03-01), None
patent: WO0075958 (2000-12-01), None
patent: 01/24224 (2001-04-01), None

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