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:
Dec. 13, 1994
Filed:
Feb. 22, 1993
Applicant:
Inventors:
Moritoshi Miyamoto, Kawasaki, JP;
Masato Inoue, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369112 ; 369118 ; 369122 ; 259209 ;
Abstract
At least two light sources are provided for an optical information recording/reproducing apparatus. The light sources emit a recording light beam and a reproducing light beam to form a recording light spot and a reproducing light spot on a recording medium. A wedge glass plate is interposed in the optical path of the beams. The wedge glass plate is rotated to adjust one or both positions of the recording and reproducing light spots formed on the recording medium.