General Electric Company

Carl V Gunter

Rajasingh Schwartz Israel

John M Davenport

Gary Robert Allen

Richard L Hansler

Thomas G Parham

Frederic F Ahlgren

Mark E Duffy

Rolf S Bergman

Thomas M Golz

Frederick W Dynys

Ashfaqul Islam Chowdhury

Peter William Brown

Charles D Tschetter

An optical interference coating for reflecting infra-red radiation and transmitting visible light. The coating comprises alternating layers of high index of refraction material and low index of refraction material. As the total number of layers increases, the ratio of high index of refraction material to low index of refraction material must also increase.

Stress relief mechanism for optical interference coatings

A light source comprising a light generating element and a reflector, said reflector comprised of a generally parabolic shaped body including an at least substantially closed end and an open end, the light source disposed generally adjacent said closed end, said reflector including a light reflecting coating on both an internal and an external surface of said body, wherein a portion of said external surface of said body adjacent the closed end of the reflector is substantially devoid of said coating.

Increased life reflector lamps

A shroud ( ) for a light producing element ( ). The shroud having an elongated reflecting portion ( ) with a curved cross-section and an elongated light-transmissive portion ( ) with a curved cross-section. A cavity in which the light producing element is disposed is formed between the reflecting portion and the light-transmissive portion. A lamp ( ) having a shroud ( ) according to the invention is also disclosed as is a method of fabricating a shroud according to the invention.

LPCVD coated reflector

An interference filter or coating is provided in a predetermined pattern on a lamp envelope. The coating is comprised of alternating layers of high and low index of refraction materials applied to a vitreous outer surface of a lamp envelope. The coating may be geometrically symmetric or asymmetric, continuous or discontinuous with respect to the coating itself or the envelope to which it has been applied. The envelope can be masked prior to deposition of the coating so that removal of the mask leaves the filter in the desired pattern. The preferred process for forming the coating includes forming a boric oxide mask on a portion of the envelope, applying the coating over the mask and removing the coating from masked areas of the envelope by dissolving the mask in an aqueous solution.

Patterned optical interference coatings for electric lamps

Patterned optical interference coatings for only a portion of a high

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Twinsburg, OH, United States of America

Carl V Gunter