Optical interference coatings and lamps using same

Details Optical interference coatings and lamps using same Optical interference coatings and lamps using same

1994-05-26

1999-11-09

Horabik, Michael

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

359359, H01J 508

Patent

active

059820780

ABSTRACT:
Optical interference coatings useful on lamps for transmitting visible light radiation at about 90% average from 400-770 nm and for reflecting infrared radiation comprise three spectrally adjacent multiperiod stacks of alternating high and low index of refraction layers. Compared to conventional filters, these filters have a greater tolerance to layer thickness variations incurred during manufacture with little or no color shift when viewed at non-normal angles.

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patent: 4588923 (1986-05-01), Hoegler et al.
patent: 4663557 (1987-05-01), Martin, Jr. et al.
patent: 4689519 (1987-08-01), Ooms et al.
patent: 4701663 (1987-10-01), Kawakatsu et al.
patent: 4734614 (1988-03-01), Kuus
patent: 4896928 (1990-01-01), Perilloux et al.
patent: 4940636 (1990-07-01), Brock et al.
"Computer--aided Multilayer Design of Optical Filters with Wide Transmittance Bands Using SiO.sub.2 and TiO.sub.2 ", A.G. Lotz, Applied Optics, vol. 26, No. 20, pp. 4487-4490, Oct. 1987.

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