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. 15, 1988
Filed:
Dec. 30, 1985
Applicant:
Inventor:
Katsumi Mizunoe, Yokohama, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; G11B / ;
U.S. Cl.
CPC ...
369 13 ; 369110 ; 369 44 ; 360114 ; 365122 ;
Abstract
A reproducing apparatus for magneto-optical discs has a moving head portion and a fixed head portion. Light reflected from the disc is divided into two parallel light beam components having different planes of polarization. These light beam components are transmitted to corresponding light intensity detectors of the fixed head portion. The outputs of the detectors are unaffected by movement of the movable head portion relative to the fixed head portion radially of the disc and are unaffected by movement of the movable head portion in other directions due to inaccuracies in the slider mechanism that moves the movable head portion radially.