Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1980-12-17
1983-06-07
Evans, F. L.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
350255, 369 44, 369 45, G02B 702
Patent
active
043868231
ABSTRACT:
An objective lens driving device for driving an objective lens and correcting a relative positional error, i.e. a tracking error between one or more information tracks recorded spirally or concentrically on a disc-shaped record medium and a light spot projected onto the record medium by means of the objective lens, comprising a supporting means for movably supporting the objective lens or its holding means in a direction perpendicular to an optical axis of the objective lens as well as the information track, first and second magnetic members arranged at both sides of the objective lens or its holding means as viewed in a direction perpendicular to the moving direction of the objective lens or its holding means and made integral therewith, first, second, third and fourth yokes each including one portion opposed through an air gap to one of the two ends of the magnetic member, first, second, third and fourth coils each wound around that portion of the yoke which is opposed to the magnetic member, and a magnetic field generation means for producing a closed loop of magnetic field passing through the first, second, third and fourth yokes as well as the first and second magnetic members.
REFERENCES:
patent: 4302830 (1981-11-01), Hamaoka et al.
Evans F. L.
Olympus Optical Co,. Ltd.
LandOfFree
Objective lens driving device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Objective lens driving device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Objective lens driving device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2340766