Lamp that emits colored light

Details Lamp that emits colored light Lamp that emits colored light

2007-02-13

2007-02-13

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

C313S634000

Reexamination Certificate

active

10839259

ABSTRACT:
A lamp includes a transparent envelope having a first region defining an enclosed interior volume and a closure region adjacent to the first region, a light source in the interior volume and electrically coupled through the closure region, an interference filter coating on the exterior of the first region, and a light absorbing coating that is 7–40 nanometers thick on the exterior of the first region, except in a ring-shaped portion adjacent to the closure region that has a thickness of 50–200 nanometers.

REFERENCES:
patent: 5200855 (1993-04-01), Meredith et al.
patent: 6611082 (2003-08-01), McGuire
patent: 6661164 (2003-12-01), Ruemmelin et al.
patent: 0986093 (2000-03-01), None
patent: 11565514 (2001-11-01), None

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