Optical card recording/reproducing apparatus with compensation f

Details Optical card recording/reproducing apparatus with compensation f Optical card recording/reproducing apparatus with compensation f

1988-07-25

1990-08-21

Faber, Alan

Registers

Coded record sensors

Feed mechanisms

235454, 235479, 235480, G06K 13067, G06K 710

Patent

active

049508768

ABSTRACT:
An optical card recording/reproducing apparatus comprises a fixed optical head for scanning the surface of the card with a light beam, a shuttle for holding an optical card, and a motor for moving the shuttle with respect to the optical head. The moving position of the shuttle is detected by a rotary encoder coupled to the motor. The detection output of the encoder provides data which represents the relative positional relationship between the shuttle and the optical head and is used to control the moving speed of the shuttle in such a way that a data area on the optical card is scanned by the light beam at a constant speed. The state in which the optical card is loaded in the shuttle can also be detected, and this detection output is used to compensate for the detection result of the rotary encoder. As a result, the moving speed of the shuttle can be controlled in accordance with the relative positional relationship between the optical head and the optical card.

REFERENCES:
patent: 3706860 (1972-12-01), Burbank
patent: 3836753 (1974-09-01), Pass
patent: 3852573 (1974-12-01), Dolch
patent: 3921969 (1975-11-01), Hickey et al.
patent: 3946205 (1976-03-01), Melugin et al.
patent: 4544835 (1985-10-01), Drexler
patent: 4556966 (1985-12-01), Bricot et al.
patent: 4800258 (1989-01-01), Suzuki et al.
patent: 4833548 (1989-05-01), Watanabe

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