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

1989-05-03

1992-05-05

Envall, Jr., Roy N.

Registers

Coded record sensors

Particular sensor structure

235495, 3692753, 3692754, 369 4414, G11B 700

Patent

active

051110318

ABSTRACT:
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. A recording/reproduction apparatus for the card comprises 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.

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