G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.1
G11B 19/12 (2006.01) G11B 11/10 (2006.01) G11B 11/105 (2006.01)
Patent
CA 1312671
ABSTRACT OF THE DISCLOSURE In an optical magnetic record signal processing system in which a linearly polarized light beam is projected on an optical magnetic medium and a recorded signal is reproduced by using polarized conditions of a reflected light beam from the medium, the processing system includes a novel type of record face identifying device for the optical magnetic record medium according to the invention comprising: an initialized area projecting means which projects a light beam on an initialized area of an optical magnetic record medium; a transducing means which converts a slant of a polarization plane of a reflected light beam from the initialized area into a light intensity; a photo-detecting means which detects the light intensity outputted from the transducing means; a comparing means which compares an output from the photo-detecting means with a reference level.
568737
Deguchi Toshihisa
Fuji Hiroshi
Fujiwara Tsuneo
Iwaki Takashi
Numata Tomiyuki
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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