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US 2003/0117061 A1Published application
Metal halide lamp with improved red rendition and CRI
AssigneeKoninklijke Philips Electronics N.V.
InventorsKevin S. Dombrowski, Claudia Alicia Rojas-Cedillo
Life of this patent
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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.
Claims9
A lamp comprising
- a light source having a pair of opposed leads,
- a protective sleeve around the light source, and
- a metal frame supporting said sleeve,
- wherein the protective sleeve comprises neodymium.
1 more element
A lamp comprising
- a light source formed by a metal halide arc tube,
- a protective sleeve around the light source, and
- a metal frame supporting said sleeve,
- wherein the protective sleeve is composed of neodymium.
1 more element
Dependencies are inferred from the claim text.