Electric lamp or space discharge component or device manufacturi – Process – With coating – e.g. – providing protective coating on...
Patent
1996-08-27
1997-10-14
Bradley, P. Austin
Electric lamp or space discharge component or device manufacturi
Process
With coating, e.g., providing protective coating on...
427106, 427165, 427272, H01J 920
Patent
active
056765797
ABSTRACT:
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.
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Ahlgren Frederic F.
Allen Gary R.
Bergman Rolf S.
Davenport John M.
Duffy Mark E.
Bradley P. Austin
General Electric Company
Hawranko George E.
Knapp Jeffrey T.
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