| 摘要 |
A deterioration of reproduction light is occurred by a laser drive current on which a high-frequency current is superimposed. The present invention, for example, is an optical information reproducing apparatus which irradiates a laser beam to an optical disc 1 and reads an information, the optical information reproducing apparatus includes a semiconductor laser 6 which generates the laser beam, a laser drive unit 7 which supplies a drive current on which a high-frequency current are superimposed to the semiconductor laser 6, a spindle motor 2 which drives the optical disc 1 and a control unit 5 which controls the laser drive unit 7 and the spindle motor 2, and the control unit 5 determines a parameter of the high-frequency current based on magnitude of a current on which the high-frequency current is to be superimposed.
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