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:
Aug. 28, 2012
Filed:
Nov. 18, 2010
Xeufeng Wang, Schenectady, NY (US);
Pierino Gianni Bonanni, Loudonville, NY (US);
Xiaolei Shi, Niskayuna, NY (US);
Zhiyuan Ren, Malta, NY (US);
Hua Xia, Niskayuna, NY (US);
Victor Petrovich Ostroverkhov, Ballston Lake, NY (US);
Xinghua Wang, Clifton Park, NY (US);
Xeufeng Wang, Schenectady, NY (US);
Pierino Gianni Bonanni, Loudonville, NY (US);
Xiaolei Shi, Niskayuna, NY (US);
Zhiyuan Ren, Malta, NY (US);
Hua Xia, Niskayuna, NY (US);
Victor Petrovich Ostroverkhov, Ballston Lake, NY (US);
Xinghua Wang, Clifton Park, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
Techniques are provided for controlling the reading of optical data from a master disk in a holographic replication system. Imperfections in the master disk or movement of the disk during a recording process may cause source beams to deviate from target data tracks. In some embodiments, a detector system is used to determine the focus and alignment of the source beams on the master disk, as well as the tilt and rotation of the disk with respect to the holographic replication system. The detector system may detect deviations in the intensity distribution of the reflections of the source beams and generate an error signal corresponding to focusing, tracking, tilt, and/or rotational errors. Servo-mechanical devices may actuate optical components to compensate for such errors.