Optical memory plate or panel
AssigneeAgfa-Gevaert
InventorsLuc Struye, Paul Leblans, Johan Lamotte
Life of this patent
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Abstract
An optical memory plate particularly suitable for identification purposes or protection against forgery and counterfeiting radiation provides inscription of data and read-out of thus stored inscription data, comprises a europium doped alkali metal halide storage phosphor layer, and, more preferably, a stimulable CsBr:Eu phosphor substantially free of alkaline earth metals.
Claims18
Method of recording data in an optical memory plate by the step of exposing said plate by radiation inscription proceeds with radiation having a wavelength of 400 nm or less and providing read-out wherein said optical memory comprises a europium doped alkali metal halide storage phosphor layer, substantially free of alkaline earth metals by the step of exposing said plate by radiation inscription with a red laser, provided that emission in the red part of the visible spectrum appears after ultraviolet radiation.
Method of recording data in an optical memory plate by the step of exposing said plate by radiation inscription proceeds with radiation having a wavelength of 400 nm or less and providing read-out wherein said inscription and read-out of said optical memory plate incripted with data from at least one application selected from the group consisting of computer system, radiographic imaging systems, security system, identification or verification system, and forgery protection system wherein said inscription is an inscription of data in form of a text, including figures and characters, and a bar code.
Method of recording data in an optical memory plate by the step of exposing said plate by radiation inscription proceeds with radiation having a wavelength of 400 nm or less and providing read-out wherein said inscription and read-out of said optical memory plate incripted with data from at least one application selected from the group consisting of computer system, radiographic imaging systems, security system, identification or verification system, and forgery protection system wherein said inscription of data is not erasable.
Dependencies are inferred from the claim text.