Phase change optical information recording system with a header

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium

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3692751, 3692754, 369 4426, 369 4437, G11B 700

Patent

active

054935520

ABSTRACT:
An optical recording and readout system comprises a first optical system for projecting a plurality of optical beams onto a phase-change optical disk, a second optical system for picking out the reflected light from the optical disk, a optical sensor for sensing the reflected light picked out by the second optical system, and a signal generating circuit for producing an information signal from the output signal from the optical sensor, wherein the phase-change optical disk contains a data area containing land tracks and groove tracks on both of which user information is recorded, the land tracks and groove tracks being formed on the data area alternately, and a header area in which header information is recorded in the form of prepit rows every other track with respect to the tracks including the land and groove tracks.

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George S. Moore, "High Density Format for Sperry/Information Storage Inc., Second Generation Optical Drives," SPIE vol. 695, 1986, pp. 230-238.
Takashi Nakagomi et al., "Development of High Speed Magneto-Optical Disc Drive Using 4 Optical Head," IEICE Technical Report, 1990, 37-34.
K. Kayanuma et al: "High Track Density Magneto-Optical Recording using a Crosstalk Canceler" SPIE vol. 1316, pp. 35-39, Mar., 1990.
N. Miyagawa et al: "Improvement of Track Density by Land and Groove Recording on Phase Charge Optical Disk" ISOH/ODS'93 Conference Digest pp. 57-58, Jul., 1993.

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