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:
Oct. 05, 2004
Filed:
Dec. 04, 2002
P. S. Ramapujam, DK-4000 Roskilde, DK;
Soren Hvilsted, DK-2800 Kgs. Lyngby, DK;
Pál Koppa, H-1053 Budapest, HU;
Emöke Lörincz, H-1118 Budapest, HU;
Gábor Szarvas, H-1033 Budapest, HU;
Péter Richter, H-1093 Budapest, HU;
Peter Toth, S-374 52 Asarum, SE;
Other;
Abstract
There is disclosed a method for the holographic recording of data, wherein a hologram containing the date is recorded in a waveguide layer ( ). The holograms are formed in a layer structure containing multiple waveguide layers ( ). Coupling means ( ) are provided for selectively coupling the reference beam ( ) into the single waveguide layers ( ) of the layer structure. The invention also relates to an arrangement for holographic recording of data, comprising a data storage medium with a waveguide holographic storage layer, and an optical system for writing and reading the holograms. The optical system comprises means for imaging an object beam ( ) and a reference beam ( ) on the storage medium. The arrangement comprises multiple waveguide holographic storage layers ( ) in the storage medium, and means for selectively coupling the reference beam ( ) into the single waveguide layers ( ) of the layer structure.