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:
Nov. 04, 2008
Filed:
Mar. 28, 2002
Steffen Noehte, Weinheim, DE;
Christoph Dietrich, Heidelberg, DE;
Robert Thomann, Heidelberg, DE;
Stefan Stadler, Hamburg, DE;
Jörn Leiber, Hamburg, DE;
Steffen Noehte, Weinheim, DE;
Christoph Dietrich, Heidelberg, DE;
Robert Thomann, Heidelberg, DE;
Stefan Stadler, Hamburg, DE;
Jörn Leiber, Hamburg, DE;
Tesa Scribos GmbH, Heidelberg, DE;
Abstract
Producing a digital hologram-in a storage medium includes: (i) focusing a write beam onto the storage medium; (ii) moving the write beam two-dimensionally relative to the storage medium; (iii) focusing a scanning beam onto a beam-guiding mask having a plurality of tracks; (iv) moving the scanning beam two-dimensionally relative to the mask, the movement of the scanning beam being coupled with the movement of the write beam; (v) generating a position control signal when the position of the scanning beam deviates from the scanned track by a predefined value; (vi) controlling the position of the write beam on the storage medium with the aid of the position control signal; and (vii) writing the hologram by introducing radiation energy point by point, the intensity of the write beam being controlled as a function of the position of the write beam on the storage medium.