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US 3,933,504 AGranted
Photochromic lithium niobate and method for preparing same
AssigneeRCA Corporation
InventorsWilliam Phillips, David Lloyd Staebler
Life of this patent
Estimating the term…
Abstract
Photochromic lithium niobate crystals containing iron and either manganese or copper are useful for recording phase holograms in the photosensitive state of the crystals, which holograms can be permanently fixed and read out without loss in the quality of the image obtained therefrom over extended periods.
Claims4
Photochromic lithium niobate containing at least about 0.001 mol percent of iron as a first dopant and at least about 0.001 mol percent of a second dopant selected from the group consisting of manganese and copper.
Dependencies are inferred from the claim text.