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:
Jul. 24, 2012
Filed:
Feb. 21, 2006
Holographic recording medium having a track pitch smaller than a distance between adjacent holograms
Heiko Trautner, Unterkirnach, DE;
Hartmut Richter, Villingen-Schwenningen, DE;
Dietmar Braeuer, Villingen-Schwenningen, DE;
Christof Ballweg, Villingen, DE;
Heiko Trautner, Unterkirnach, DE;
Hartmut Richter, Villingen-Schwenningen, DE;
Dietmar Braeuer, Villingen-Schwenningen, DE;
Christof Ballweg, Villingen, DE;
Thomson Licensing, Boulogne-Billancourt, FR;
Abstract
The present invention relates to a holographic recording medium adapted to store additional information for the recorded holograms, and to a holographic pickup for a holographic storage system for use with the holographic recording medium. According to the invention, the holographic recording medium has a holographic layer for storing holograms and a servo layer for positioning a light beam for reading and/or recording of a hologram relative to the holographic recording medium, wherein the servo layer is recordable or rewritable. A holographic pickup for use with such a holographic recording medium includes a light source for recording additional data in the servo layer of the holographic recording medium.