G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.4
G11B 11/10 (2006.01) G02F 1/09 (2006.01) G11B 7/08 (2006.01) G11B 11/105 (2006.01) H04N 1/21 (2006.01)
Patent
CA 1190321
ABSTRACT OF THE DISCLOSURE In a magneto-optical head assembly for a re- flection type magneto-optical memory apparatus which uses a laser beam for recording, retrieving, and erasing data on a recording medium comprised of a vertical, magnetic, and anisotropic thin film, the light beam emitted from the head assembly is guided to a fixed position on the recording medium in response to a control signal received by light detection apparatus and a separate light detection apparatus is provided for receiving a data signal. A beam splitter is positioned in the optical system through which the laser beam passes. A multilayer thin film dielectric material capable of increasing the Kerr rotation angle of the laser beam reflected from the recording medium may be applied to the beam splitter.
414156
Deguchi Toshihisa
Ohta Kenji
Takahashi Akira
Yamaoka Hideyoshi
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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