Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1993-02-05
1996-01-16
Psitos, Aristotelis
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4415, 310328, 310309, G11B 7095
Patent
active
054854377
ABSTRACT:
A pick-up device for optical recording and playback includes two linear actuators coupled to an optical module and lying in a plane normal to the surface of an optical recording medium. The actuators are obliquely inclined to the optical axis of the optical module. Proportional differential actuation of the linear actuators moves the optical module bi-axially, i.e., normal or parallel to the recording medium surface, permitting control of both focus and tracking of information bits on the surface. The preferred embodiment employs two bi-directional linear actuators, each comprising a pair of back-to-back uni-directional actuators, each of which includes a flexible tubular housing enclosing a stack of thin, perforated disc-shaped electrodes separated by a dielectric fluid. Conductive elastomeric spacer rods support the disks in a parallel, longitudinally, spaced apart arrangement. Applying a voltage to adjacent pairs of disks via the conductive elastomeric rods causes an electrostatic attraction force between adjacent disks to shorten the stack. Contraction of the stack housing causes an elongated actuator rod disposed longitudinally through the housing and attached to a transverse end cap sealing the housing at one end to be extended further from the opposite end cap of the housing, the free end of the rod thus being able to exert a pushing force.
REFERENCES:
patent: 2113184 (1938-04-01), Sperti
patent: 3530258 (1970-09-01), Gregg et al.
patent: 4092529 (1978-05-01), Aihara et al.
patent: 4252412 (1981-02-01), Camerik
patent: 4269486 (1981-05-01), Shintani
patent: 4302830 (1981-11-01), Hamaoka et al.
patent: 4322837 (1982-03-01), Mickleson et al.
patent: 4337531 (1982-06-01), Willemsen
patent: 4342935 (1982-08-01), Kallmeyer et al.
patent: 4367543 (1983-01-01), Araki et al.
patent: 4488789 (1984-12-01), Kenney
patent: 4672594 (1987-06-01), Kato et al.
patent: 4794581 (1988-12-01), Andresen
patent: 4807213 (1989-02-01), Chung et al.
patent: 4822139 (1989-04-01), Yoshizumi
patent: 4857719 (1989-08-01), Ando
patent: 4927235 (1990-05-01), Narumi
patent: 4939711 (1990-07-01), Yoda
patent: 4942562 (1990-07-01), Suzuki
patent: 4945526 (1990-07-01), Jansen et al.
patent: 4945527 (1990-07-01), Sunagawa
patent: 4945529 (1990-07-01), Ono et al.
patent: 4948230 (1990-08-01), Kasahara et al.
patent: 5084645 (1992-01-01), Collins, Jr. et al.
patent: 5113108 (1992-05-01), Yamashita et al.
patent: 5170089 (1992-12-01), Fulton
IBM Technical Disclosure Bulletin, Electrostatic Device, R. A. Jones, vol. 6 , No. 4, Sep. 1963, p. 134.
NASA Tech Brief, Licensing Opportunity, Electrostatic Linear Actuator, 2301 Tech Notes, Jul. 1990 Springfield, Va., US; p. 568.
Braun Robert T.
Clark Ronald J.
Discovision Associates
Psitos Aristotelis
Tran Thang V.
LandOfFree
Shock-resistant, electrostatically actuated pick-up for optical does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shock-resistant, electrostatically actuated pick-up for optical , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shock-resistant, electrostatically actuated pick-up for optical will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-314780