Optical card and a recording/reproduction apparatus for the same

Details Optical card and a recording/reproduction apparatus for the same Optical card and a recording/reproduction apparatus for the same

1991-12-11

1992-08-04

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692754, 369111, 235456, 235495, G11B 700

Patent

active

051365740

ABSTRACT:
An apparatus for recording and reproducing information using an optical card comprising a memory region in which one pit train for supplying a track servo signal and a synchronizing signal is formed at a edge portion of the memory region. The optical card achieves increased storing capacity by including only one pit train. The recording/reproduction apparatus for the card has a first and second optical heads. The first optical head scans the pit train to obtain the track servo signal and a synchronizing signal. The second optical head is used for recording and reproducing information from the optical card.

REFERENCES:
patent: 4779154 (1988-10-01), Lemelson
patent: 4817067 (1989-03-01), Takahashi et al.
patent: 4985616 (1991-01-01), Nakamura et al.

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