Magneto-optic recording method and magneto-optic...

Details Magneto-optic recording method and magneto-optic... Magneto-optic recording method and magneto-optic...

G - Physics

11

B

G11B 11/10 (2006.01) G11B 11/105 (2006.01) G11B 13/04 (2006.01)

Patent

CA 2060535

ABSTRACT OF THE DISCLOSURE A method and apparatus for recording and reproducing information onto and from a magneto-optic recording medium is disclosed. The magneto-optic recording medium has at least a reproducing layer and a recording layer. A recording optical head records information on the magneto-optic recording medium. A reproducing optical head has a reading light beam for reading information recorded in a region within a spot of the reading light beam by magneto-optic effect by changing a state of magnetization of the reproducing layer and at the same time irradiating the recording medium with the light beam. A wavelength of the recording light beam emitted by the recording optical head is substantially smaller than a wavelength of the reading light beam emitted by the reading optical head. A minimum ratio of the wavelength of the recording light beam to that of the reproducing light beam is 1:3.

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