The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2005
Filed:
Feb. 16, 2000
Applicants:
Min Gu, Victoria, AU;
Daniel J Day, Victoria, AU;
Andrew J. Smallridge, Victoria, AU;
Inventors:
Assignee:
Victoria University of Technology, Footscray, AU;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C013/02 ;
U.S. Cl.
CPC ...
Abstract
A method of erasable/rewritable optical data storage is provided in which a laser beam from a laser () operated in either a pulsed or continuous wave mode is focussed by an optical system () onto a photorefractive polymeric material () to cause two photon excitation of the material to record data which may subsequently be erased by illuminating the material with radiation having a wavelength in the ultraviolet or visible spectrum to erase the recorded data. New photorefractive polymeric materials having a relatively narrow absorption band for use in the method are also disclosed.