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. 19, 2005
Filed:
Mar. 25, 2003
Satoshi Sumi, Gifu, JP;
Yoshihisa Suzuki, Ichinomiya, JP;
Sayoko Okada, Gifu, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A magneto-optical disk apparatus generates magnetic field onto a magneto-optical recording medium prior to recording signals in the magneto-optical recording medium having a recording layer and a reproduction layer, by use of magnetic field and laser beam. The magneto-optical apparatus then adjusts a position of a magnetic head that generates the magnetic field, under a state where the laser beam is irradiated, by utilizing that an irradiation spot of the laser beam deviates due to eccentricity of the magneto-optical recording medium. This position adjustment is carried out based on, for example, a beam position signal showing the irradiation spot of the laser beam and/or a detection signal which is detected after the laser beam is modulated by the magnetic field.