Optical information reproducing apparatus

Details Optical information reproducing apparatus Optical information reproducing apparatus

1995-12-11

1997-03-11

Wong, Don

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369110, G01B 1102

Patent

active

056108974

ABSTRACT:
In an optical information recording/reproducing apparatus, the reproduction of information is performed as following manner. A light spot is formed on a recording medium on which information is recorded so that a phase of light reflected by a small region as an information pit is different from a phase of light reflected by other regions. Upon scanning the recording medium with the light spot, a leading edge and a trailing edge of the information pit in the scanning direction are respectively detected. A detection signal for the leading edge of the information pit and a detection signal for the trailing edge of the information pit are synthesized to effect the reproduction of information.

REFERENCES:
patent: 5105399 (1992-04-01), Shimonou
patent: 5251198 (1993-10-01), Strickler
patent: 5270794 (1993-12-01), Tsuji et al.
Masud Mansuripur, Detecting Transition Regions in Magneto-optical Disk Systems, "Applied Physics Letters", vol. 55, No. 8, Aug. 21, 1989, pp. 716-717.
Marc D. Levenson, et al., "Edge Detection for Magnetooptical Data Storage", vol. 30, No. 2, Jan. 10, 1991, pp. 232-252.

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