Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1996-02-23
1998-05-05
Tran, Thang V.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
360114, G11B 708
Patent
active
057485798
ABSTRACT:
An optical pickup magneto-optically records information on a magneto optical disc in cooperation with a magnetic head. The optical pickup is disposed at one surface side of the magneto optical disc while the magnetic head is disposed at the other surface side of the magneto optical disc during a recording operation of the magneto optical disc. The optical pickup is provided with: a light emission device for emitting a light beam; an optical system for guiding the emitted light beam; an objective lens for converging and focusing the guided light beam onto the optical disc; and an actuator holding the objective lens and having a magnetic circuit for actuating the objective lens to move in focusing and tracking directions respectively of the magneto optical disc by a magnetic force generated by the magnetic circuit. The magnetic circuit includes a magnetic flux generation device for generating a magnetic flux and a yoke for transmitting the generated magnetic flux in the magnetic circuit to generate the magnetic force. The optical pickup is further provided with: a base plate, to which the actuator is attached, having a wall portion prescribing an aperture through which the light beam passing the objective lens is transmitted; and a body case having a wall prescribing an internal space and an opening, which opens toward the magneto optical disc and which is covered by the base plate, for accommodating the light emission device, the optical system and the magnetic circuit.
REFERENCES:
patent: 4769806 (1988-09-01), Takamori
patent: 4956833 (1990-09-01), Kokado et al.
patent: 4959820 (1990-09-01), Horimai et al.
patent: 5126983 (1992-06-01), Ikegame et al.
patent: 5239532 (1993-08-01), Hensing et al.
patent: 5264968 (1993-11-01), Masunaga
Masunaga Yoshifumi
Miyagi Takahiro
Takaya Shigeru
Pioneer Electronic Corporation
Tran Thang V.
LandOfFree
Optical pickup for magneto optical recording apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical pickup for magneto optical recording apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup for magneto optical recording apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-62848