| 摘要 |
PURPOSE:To reduce the output load of an auxiliary magnetic field generation means and to efficiently switch an auxiliary magnetic field intensity by making the permanent magnet of an objective lens driving means generate the magnetic field in the same direction to the magnetic field impressed from the auxiliary magnetic field generation means at the time of deleting information in the light beam projected part of a magneto-optical recording medium. CONSTITUTION:A magneto-optical recorder has a driving means which includes the objective lens 5 focusing the light beam on the magneto-optical recording medium 1, the permanent magnet 9 and a coil 11 and drives the objective lens 5, at least, in one direction, and the magnet field generation means 6 which impresses the auxiliary magnetic field on the medium in the respective directions which are different at the time of recording information and at the time of deleting information and the permanent magnet 9 of the drive means is allowed to generate the magnetic field which has the same direction as the magnetic field impressed from the magnetic field generation means 6 at the time of deleting information in the light beam projected part of the medium 1. Thus the output load of the auxiliary magnetic field generation means 6 can be reduced and auxiliary magnetic field intensity can be efficiently switched at the time of recording information and at the time of deleting information. |
