Optical coating with selectable transmittance characteristics an

Details Optical coating with selectable transmittance characteristics an Optical coating with selectable transmittance characteristics an

1975-10-01

1977-02-01

Grimm, Siegfried H.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

252300, 313221, 350 1, 350311, G02B 520, H01J 6140

Patent

active

040063780

ABSTRACT:
A layer of zinc oxide disposed on the surface of a substrate in thicknesses of between 500 and 10,000 Angstroms is characterized by a sharp absorption edge to substantially absorb selected wavelengths of radiation incident thereon while transmitting other selected wavelengths. The wavelength of the absorption edge is selectable as a function of temperature. A method of depositing the zinc oxide layer is also described.

REFERENCES:
patent: 2774903 (1956-12-01), Burns
patent: 3148300 (1964-09-01), Graff
patent: 3676729 (1972-07-01), Menelly
patent: 3850665 (1974-11-01), Plumat et al.

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