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:
Jul. 13, 1999
Filed:
Nov. 12, 1997
Applicant:
Inventors:
Masato Inoue, Kawasaki, JP;
Kengo Emoto, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369109 ; 369112 ;
Abstract
In an optical information recording and/or reproducing apparatus, a light beam from an irradiation optical system is split into a plurality of beams by a diffraction grating. The plurality of light beams split by the diffraction grating are caused to irradiate an optical information recording medium. A light beam from the optical information recording medium is detected by a detection optical system. A beam axis adjusting mechanism is provided in an optical path between the irradiation optical system and the diffraction grating so as to adjust a position of a beam incident to the diffraction grating.