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:
Feb. 26, 1985
Filed:
Jun. 30, 1982
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 46 ;
Abstract
An optical signal reproducing system uses laser light reflected from a recording disc track 12 to recover signals stored in pits 13 separated by lands. The differential output of the reflected light only when the focused beam is incident on pits is used to control lateral tracking offset correction in a negative feedback mode, thereby immunizing the system from false tracking correction due to light reflected from lands when the disc is tilted from the optical axis.