Diffusely reflecting optical interference filters and articles i

Details Diffusely reflecting optical interference filters and articles i Diffusely reflecting optical interference filters and articles i

1992-12-17

1995-05-02

O'Shea, Sandra L.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

313580, 313635, 359582, 359586, 359587, H01K 126

Patent

active

054122740

ABSTRACT:
A multilayer optical interference filter having a controlled degree of diffuse reflection over a desired visible wavelength range, includes alternating layers of at least one high refractive index material and at least one low refractive index material, wherein at least one layer of the alternating layers is a light scattering layer comprised of titania which diffusely reflects light over a desired visible wavelength range. The multilayer optical interference filter may be provided by a process including sequentially applying the alternating layers by chemical vapor deposition from respective precursors at temperatures effective to pyrolytically decompose the respective precursors, wherein the precursor of the light scattering layer comprised of titania is at least one branched alkoxide of titania. Vitreous and light transmissive articles, including electric lamps, reflectors, and/or lenses, are provided with a multilayer optical interference filter according to the invention to provide them with a controlled degree of diffuse reflection.

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patent: 5267081 (1993-11-01), Pein

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