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. 21, 2008
Filed:
Feb. 07, 2006
Joachim Knittel, Tuttlingen, DE;
Hartmut Richter, Villingen-Schwenningen, DE;
Stephan Knappmann, Zimmern ob Rottweil, DE;
Joachim Knittel, Tuttlingen, DE;
Hartmut Richter, Villingen-Schwenningen, DE;
Stephan Knappmann, Zimmern ob Rottweil, DE;
Thomson Licensing, Boulogne Billancourt, FR;
Abstract
The present invention relates to a holographic disk medium () with servo marks (), and more specifically to a holographic disk medium () having a common reflective layer () for reflecting a servo beam () and object and reference beams (). According to the invention, a holographic disk medium () with a recording layer () for recording holograms () and a reflective layer () for reflecting a servo beam () and object and reference beams (), includes servo marks () which are located in the reflective layer () at least partly below the holograms (), wherein the servo marks () are designed such that their influence on the object and reference beams () is minimized.