Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1995-07-31
1996-05-14
Hindi, Nabil Z.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 4424, 369112, G11B 700
Patent
active
055174809
ABSTRACT:
A magneto-optical information reproducing apparatus includes a device for irradiating a light beam polarized in a predetermined direction onto a recording medium having information magnetically recorded thereon, a device for splitting a reflected or transmitted light beam from the medium, polarization-modulated by a magneto-optical effect in accordance with the information into a first light beam for generating a servo signal and second and third light beams polarized orthogonally for generating a reproduced signal, and a detection device for detecting the three split light beams. The splitting device is arranged such that the three light beams exit in substantially the same direction and the directions of polarization of the second light beam and the third light beam make an angle of 45 degrees with respect to the predetermined direction of polarization of the irradiated light beam.
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Koyama Osamu
Matsuoka Kazuhiko
Canon Kabushiki Kaisha
Hindi Nabil Z.
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