Lamp with ir reflecting film and light-scattering coating

Details Lamp with ir reflecting film and light-scattering coating Lamp with ir reflecting film and light-scattering coating

H - Electricity

01

K

H01K 1/28 (2006.01) G02B 5/28 (2006.01) H01J 5/16 (2006.01) H01J 61/35 (2006.01) H01J 61/40 (2006.01)

Patent

CA 2116950

LAMP WITH IR REFLECTING FILM AND LIGHT- SCATTERING COATING ABSTRACT OF THE DISCLOSURE Incandescent lamps or arc lamps having an infrared red reflecting multilayer optical interference filter on the outer surface of the vitreous or fused quartz lamp envelope enclosing the filament have a light- scattering coating applied over the filter to scatter light emitted by the lamp and thereby diffuse the filament image. The light-scattering coating consists of light-scattering particles, such as alumina, dispersed in a silica matrix. This coating is formed by applying to the filter a silicone solution in which is dispersed colloidal silica and light-scattering particles and pyrolyzing at high temperature to drive off the organic components and form the silica matrix.

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