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. 15, 1998
Filed:
Sep. 26, 1996
Applicant:
Inventor:
Hisatoshi Baba, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 4432 ; 369 54 ;
Abstract
An optical information recording and/or reproducing apparatus for carrying out at least one of recording and reproduction of information by projecting a light beam condensed by an objective lens onto an information track of a recording medium, includes a detecting device for detecting an inclination of an optical axis of the objective lens with respect to a direction perpendicular to a surface of the recording medium and a control device for inhibiting recording or reproduction of information, based on a detection result of the detecting device.