Patent ID: 6404705
Filing Date: 2002-06-11
Classification: G11B

Abstract:
A magneto-optical disk apparatus comprising;an optical head for focusing a laser beam as a beam spot on a magnetic layer of a magneto-optical disk; a plurality of magnetic heads for applying an external magnetic field onto said magnetic layer, said magnetic heads located as opposed to said optical head with said magneto-optical disk laid therebetween; an arm mechanism for holding said magnetic heads; and an adjustment mechanism for adjusting a setting position of said magnetic heads with respect to an optical axis of said optical head, wherein said magnetic heads are adjusted by way of a method, comprising the steps of: mounting to said magneto-optical disk apparatus provided with said optical head and said magnetic heads a magnetic super resolution type magneto optical disk having a magnetic layer whose magnetism direction is inverted toward an external magnetic field when the external magnetic field of a given intensity is applied as applying a laser beam of a reproduction level, applying the external magnetic field sequentially from each of said magnetic heads to said magneto-optical disk as applying the laser beam of the reproduction level onto said magneto-optical disk, detecting a reproduction signal output from a signal reproduction unit provided in said magneto-optical disk apparatus, and changing a setting position of said magnetic heads with respect to an optical axis of said optical head so that said reproduction signal output is made maximum with respect to the direction of said external magnetic field.