Optical disk reading head controller

Details Optical disk reading head controller Optical disk reading head controller

1987-12-29

1990-02-13

Psitos, Aristotelis M.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 43, 369 46, G11B 1722

Patent

active

049012991

ABSTRACT:
An optical disk reading apparatus having a carriage on which a tracking actuator and a photosensor unit are mounted and driven by a head actuator for moving a spot of a light beam in a direction traversing tracks on an optical disk and for detecting first position and second position signals indicative of the position of the spot on the tracks through addition and subtraction of the electric signals corresponding to changes in the quantities of light reflected from the tracks upon the movement of the spot and including circuitry for accurately placing the spot on a desired track of the disk even when the first and second position signals contained omissions.

REFERENCES:
patent: 4484319 (1984-11-01), Koshi et al.
patent: 4615023 (1986-09-01), Inada et al.
patent: 4677602 (1987-06-01), Okano et al.
"Tracking Servo for Small Size Optical Disk System", Inada et al., Optical Data Mass Storage II, 1986.

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