Optical storage process
AssigneeSyracuse University
InventorsJoseph Chaiken, Joseph M. Osman
Life of this patent
Estimating the term…
Abstract
A data storage process which includes an erasable high speed, high density, storage medium having a transition metal oxide layer where said oxide layer is capable of undergoing an optically readable chemical change when simultaneously exposed to heat and to light of a selected wavelength. An optically readable image is formed in selected regions of the oxide layer under ambient conditions which include O.sub.2 by simultaneously exposing said layer to heat and to radiation in the blue-green or shorter wavelength spectrum. The image is erased by heating the entire medium using a furnace or by heating selected portions with IR radiation.
Claims16
A data storage process which comprises:
- a. providing an erasable high speed, high density, storage medium which includes a transition metal oxide layer where said oxide layer is capable of undergoing an optically readable chemical change when simultaneously exposed to heat and to light of a selected wavelength;
- and
- b. simultaneously exposing said layer to heat and to radiation in the blue-green or shorter wavelength spectrum under ambient conditions which include oxygen, whereby a photochemical reaction is induced which includes an exchange of oxygen, resulting in the formation of an optically readable image in the exposed regions of said oxide layer.
A data storage process which comprises:
- a. providing an erasable high speed, high density storage medium which includes a coherent transition metal oxide layer in which the metal oxide is an oxide of any one of W, Mo, Ti, or V;
- b. simultaneously exposing said layer under ambient conditions and in the presence of O.sub.2 to radiation in the blue-green or shorter wavelength spectrum and infrared spectrum in selective regions of said layer;
- whereby a photochemical reaction is induced which includes an exchange of oxygen, resulting in the formation of an optically readable image in the exposed regions of said oxide layer;
- and
- c. selectively erasing at least a portion of the image formed in (b) above by exposing said image to infrared radiation in the presence of O.sub.2.
A data storage process which comprises:
- a. providing an erasable storage medium which includes a coherent layer of WO.sub.3 contained on a supporting substrate;
- and
- b. simultaneously exposing said layer to blue-green light or shorter wavelength spectrum, and infrared light in selective regions of said layer, under ambient conditions including O.sub.2 whereby a photochemical reaction is induced which includes an exchange of oxygen, resulting in the formation of a permanent optically readable image thereon.
A data storage process which comprises:
- a. providing an erasable storage medium which includes a coherent layer of MoO.sub.3 contained on a supporting substrate;
- and
- b. simultaneously exposing said layer to blue-green light or shorter wavelength spectrum, and infrared light in selective regions of said layer, under ambient conditions including O.sub.2 whereby a photochemical reaction is induced which includes an exchange of oxygen, resulting in the formation of a permanent optically readable image thereon.
A data storage process which comprises:
- a. providing an erasable high speed, high density, storage medium which includes at least one transition metal oxide layer selected from the group consisting of WO.sub.3, MoO.sub.3, and V.sub.2 O.sub.5, and where said oxide layer is capable of undergoing an optically readable chemical change when simultaneously exposed to heat and to light of a selected wavelength;
- and
- b. simultaneously exposing said layer to heat and to radiation in the blue-green or shorter wavelength spectrum under ambient conditions which include oxygen, whereby a photochemical reaction is induced which includes an exchange of oxygen, resulting in the formation of an optically readable image in the exposed regions of said oxide layer.
Dependencies are inferred from the claim text.