Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1995-03-16
1997-03-11
O'Shea, Sandra L.
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313112, 313113, 313634, 313635, H01J 102, H01J 724, H01J 6140, H01J 516
Patent
active
056104693
ABSTRACT:
An electric lamp includes a sealed outer envelope, an arctube located within the envelope, a shroud separate from the arctube having an ellipsoidally-shaped reflecting portion positioned around the arctube, and a coating disposed on the reflecting section of the shroud for reflecting light having predetermined wavelengths emitted by the arctube. The ellipsoidal shape of the shroud is effective for reflecting the light substantially back toward the arctube. Particularly when the coating is a color correcting coating, the shape of the reflecting section is tailored to maximize reflection of radiation at selected wavelengths back toward the arc of the arctube.
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"Applications of thin film reflecting coating technology to tungsten filament lamps"; IEE Proceedings-A; Bergman, R.S. and Parham, T.G.; vol. 140, No. 6 Nov., 1993; pp. 418-428.
Bergman Rolf S.
Dakin James T.
Parham Thomas G.
General Electric Company
Hawranko George E.
O'Shea Sandra L.
Patidar Jay M.
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