Reproducing apparatus having an optical head system

Details Reproducing apparatus having an optical head system Reproducing apparatus having an optical head system

1995-06-15

1997-11-11

Neyzari, Ali

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 13, G11B 1722

Patent

active

056871430

ABSTRACT:
A reproducing apparatus for reproducing an information signal from a recording medium in which a recording medium has a modulated information signal recorded thereon by one of different recording systems, includes an optical head for irradiating the recording medium with a light beam, a photoelectric detecting portion for receiving a light beam reflexed from the recording medium and for generating an electric signal as the modulated information signal in response to the received light beam, and a convertor for converting the information signal from the electric signal. The photoelectric detecting portion is arranged to generate the electric signal by different processes in the case where the modulated information signal is recorded on the recording medium by a first system and in the case where the modulated information signal is recorded on the recording medium by a second system different from the first system. The convertor includes a demodulation circuit which is commonly utilized for demodulating both modulated information signals recorded by the first and second systems.

REFERENCES:
patent: 4658146 (1987-04-01), Clements
patent: 4773053 (1988-09-01), Gottfried

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