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:
Sep. 28, 1999
Filed:
Mar. 12, 1998
Applicant:
Inventor:
Amir Alon, Sunnyvale, CA (US);
Assignee:
Zen Research NV, Curacao, AN;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 4441 ; 369 4437 ; 369124 ;
Abstract
An optical pickup assembly for a multitrack optical disk reader includes a multi-element photodetector onto which a plurality of reflected track images are projected. Circuitry is provided for detecting a magnification error, and for generating a magnification error correction signal to correct or compensate for the magnification error. Circuitry is also provided for correcting for cross-talk components in the output signals of the multi-element photodetector responsive to the detected magnification error.