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US 4,481,613 AGranted
Optical disk apparatus
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorTsuneshi Yokota
Life of this patent
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Abstract
An optical head is mounted on a carrier of a linear motor, and is moved at a high speed to a desired track, i.e., a target position, of an optical disk by the linear motor. In the optical head, a laser oscillator for generating a laser beam, a tracking unit for tracking a laser beam and a focusing unit for focusing a laser beam onto an optical disk are integrally assembled.
Claims4
An optical disk apparatus comprising:
- a linear motor having a carrier movable in the radial direction of an optical disk;
- an optical head for recording and reproducing information on and from the optical disk, said optical head being mounted on said linear motor and including a semiconductor laser for generating a laser beam, focusing means for focusing the laser beam onto said optical disk, tracking means for causing the laser beam to follow a given track on said optical disk, and detecting means for detecting the state of focusing and tracking;
- a position detecting section for detecting the position of said optical head;
- specifying means for specifying a desired target position;
- position difference detecting means for detecting the difference between the position detected by said position detecting section and the target position specified by said position specifying means;
- and
- driving means for moving the carrier of said linear motor by a distance corresponding to a position difference detected by said position difference detecting means.
4 more elements
Dependencies are inferred from the claim text.