Registers – Coded record sensors – Particular sensor structure
Patent
1988-10-17
1991-10-22
Levy, Stuart S.
Registers
Coded record sensors
Particular sensor structure
235476, 235494, 235475, 369 4426, 369 4429, 369 4434, G06K 7015, G11B 709
Patent
active
050597744
ABSTRACT:
An apparatus for handling an optical card which is generally rectangular in shape and formed with a first plurality of circular, concentric recording tracks and a second plurality of arc-shaped, concentric recording tracks in each of a pair of sectors defined by a pair of hypothetical diagonal lines of the card and located outside of the first plurality of circular, concentric recording tracks. An optical pick-up is moved to a desired track first by a coarse seek operation which uses the difference between a selected count and the count from a linear sensor, and a fine seek operation which uses the sum of a track correspondence voltage and a track error signal.
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Kubo Nobuaki
Shibata Isamu
Levy Stuart S.
Ricoh & Company, Ltd.
Weinhardt Robert
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