Optical disc and optical disc reproducing apparatus

Details Optical disc and optical disc reproducing apparatus Optical disc and optical disc reproducing apparatus

1992-04-01

1993-11-02

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369110, 3692754, 369 4442, G11B 700, G11B 726

Patent

active

052589706

ABSTRACT:
A plurality of tracks comprising pits each having a diameter smaller than a beam spot diameter of a laser beam are arranged on an optical disc. By irradiating the laser beam onto the optical disc, a plurality of pits are reproduced a lump. The reflected lights from a plurality of pits on the optical disc are supplied to a plural-divided photodetector. Outputs of the plural-divided photodetector are supplied to a matrix circuit and multidimensional vectors are formed. The data recorded on the optical disc is decoded from the multidimensional vectors. A tracking area and a clock area are provided on the optical disc. A tracking control is performed by using a reproduction signal of the tracking area. The clocks are reproduced by using a reproduction signal of the clock area.

REFERENCES:
patent: 5140577 (1992-08-01), Ohsato

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