Patent ID: 6169714
Filing Date: 2001-01-02
Classification: G11B

Abstract:
A magneto-optical information recording/reproducing apparatus in which a magneto-optical information recording medium at least including a first magnetic film having magneto-optical information recorded on a track and having perpendicular magnetic anisotropy, and a second magnetic film to which said magneto-optical information recorded on said first magnetic film is transferred by irradiation of a laser beam, is used so that a readout laser beam is irradiated onto said second magnetic film to thereby readout said magneto-optical information transferred to said second magnetic film, wherein said apparatus comprises: a 2-split detection means constituted by two detection elements for receiving said readout laser beam reflected from said second magnetic film of said magneto-optical information recording medium; a subtraction means in which output signals of said two detection elements of said 2-split detection means having levels corresponding to the quantities of light received by said two detection elements respectively are subtracted from each other to generate a differential signal expressing the difference between said output signals; means for making a spot of said laser beam jump one track before readout said magneto-optical information from said magneto-optical information recording medium; a positive/negative balance correction means for detecting an amplitude ratio between positive and negative side amplitudes in a track jump signal generated in said differential signal from said subtraction means in response to the track jump to thereby output a correction signal in accordance with said amplitude ratio; and an addition means for adding said correction signal to said differential signal to thereby generate a tracking error signal for tracking control used in readout of said magneto-optical information from said magneto-optical information recording medium.