IR-coated halogen lamp using reflective end coats
AssigneeGeneral Electric Company
InventorsLaurence Bigio, Rajasingh Israel, Ashfaqul I. Chowdhury, Laszlo Lieszkovszky
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Abstract
A halogen infrared lamp (100) having an infrared reflective coating (118) along with a totally reflecting coating (120) on ends of an ellipsoidal portion of the envelope. The totally reflecting coating reflects the infrared radiation escaping at acute angles and directs the infrared radiation towards the filament to increase the temperature of the filament and thus increase the efficacy of the lamp. The totally reflecting coating may also extend to portions of tubular members extending from the ellipsoidal portion of the envelope.
Claims20
A light source comprising:
- a lamp envelope made of a light transmissive material, wherein the envelope has an ellipsoidal portion disposed centrally between tubular portions disposed on opposite ends of the ellipsoidal portion;
- a filament centrally disposed within the envelope;
- an infrared reflective filter coating disposed on at least a portion of the lamp envelope in surrounding relation to the filament;
- a totally reflecting coating disposed on at least one end of the envelope in surrounding relation to the filament.
A light source comprising:
- a lamp envelope made of a light transmissive material;
- a filament disposed within the envelope;
- an infrared reflective filter coating disposed on at least a portion of the lamp envelope in surrounding relation to the filament;
- a totally reflecting coating disposed on and end of the envelope in surrounding relation to the filament.
Dependencies are inferred from the claim text.