Patent Number: 6,310,849

Title: Apparatus for recording and/or reproducing information and/or from optical information record disk

Abstract: An apparatus for recording and/or reproducing information on and/or from a magneto-optical disk including an optical head for projecting a laser beam onto a magneto-optical disk and receiving the laser beam reflected by the disk, an up-down block arranged movably between a lower position and an upper position, an up-down motor for moving said up-down block up and down, a turntable for supporting the disk and a spindle motor secured to said up-down block and having a driving shaft coupled with said turntable for rotating the turntable, a position detecting device for detecting a position of said up-down block to derive a position signal when the up-down block is driven into the upper position, a rotation detecting device for detecting a rotation of said optical information record disk to derive a rotation signal when the optical information record disk is rotated at a predetermined revolving speed, and a control device for initiating a focus control for moving said objective lens and turntable relative to each other in accordance with said position signal and rotation signal.

Inventors: Yamamiya; Kunio (Sagamihara, JP)

Assignee: Olympus Optical Company, Ltd.

International Classification: G11B 5/09 (20060101); G11B 7/00 (20060101); G11B 007/00 ()

Expiration Date: 10/30/2018