Seek actuator for optical recording

Details Seek actuator for optical recording Seek actuator for optical recording

1991-02-15

1993-11-23

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4421, 369249, 359824, 359813, G11B 700

Patent

active

052650790

ABSTRACT:
The present invention is an apparatus for optical reading or recording information on an optical information medium, wherein as a result of the relative position of the components of the apparatus and the magnitude and application points of the forces exerted to track and focus, the objective lens through which information is read from the information medium, prevents the objective lens from being affected by most resonances, motor forces and reaction forces. This is critical in that in optical recording, displacements of 0.02 micrometers can easily be picked up. Specifically, one aspect of the invention is an apparatus for optically reading or recording information on an optical disk which is rotatable about an axis of rotation, wherein the apparatus includes a frame, a carriage, a carriage drive, an objective lens, an objective lens holder and a focus drive. The carriage drive (i.e., those portions of the carriage motor which move relative the frame) drives the carriage along a path radial to the axis of the rotation. The objective lens is mounted on the objective lens holder so that the optical axis of the objective lens is within 0.5 millimeters of intersecting the center of mass of the carriage mass. The holder is movable relative to the carriage so as to move the objective lens along its optical axis. This movement is controlled by a focus drive (i.e., those portions of the focus motor which move relative to the carriage) which drives the holder so as to move the objective lens along its optical axis. For purposes of this application including appended claims, the carriage and actuator assembly is considered to be broken down into two mass groupings. The first is the "fine motor mass" (i.e., the mass of all components suspended for freedom of movement from the carriage). The second is the "carriage mass" (i.e., the mass of all components which move with the carriage excluding the fine motor mass and any incidental connecting wiring not wholly supported by the carriage).

REFERENCES:
patent: 4449213 (1984-05-01), Kazuiaka
patent: 4504935 (1985-03-01), Jansen
patent: 4514837 (1985-04-01), Van Rosmalen
patent: 4568142 (1986-02-01), Iguma
patent: 4571026 (1986-02-01), Maruta
patent: 4592037 (1986-05-01), Ohnuki
patent: 4596444 (1986-06-01), Ushida
patent: 4596448 (1986-06-01), Kikuchi
patent: 4643522 (1987-02-01), Takashima
patent: 4644516 (1987-02-01), Musha
patent: 4646283 (1987-02-01), Ito et al.
patent: 4669073 (1987-05-01), Wakabayashi et al.
patent: 4679904 (1987-07-01), Kurihara
patent: 4702555 (1987-10-01), Iguma et al.
patent: 4740946 (1988-04-01), Yumura et al.
patent: 4763314 (1988-08-01), McCaslin et al.
patent: 4794586 (1988-12-01), Korth
patent: 4811320 (1989-03-01), Kawasaki et al.
patent: 4823336 (1989-04-01), Inada et al.
patent: 4842392 (1989-06-01), Nakamura et al.
patent: 4845699 (1989-07-01), Kawasaki et al.
patent: 4922477 (1990-05-01), Miura
G. Bouwhuis, et al., Principles of Optical Disc Systems, Adam Hilger Ltd., Bristol, 1985, pp. 147-153.
Eguichi, Naoya, et al., An 86mm Magneto-Optical Disk Drive with a compact and fast-seek-time Optical Head, Optical Data Storage Conference, Vancouver, Mar., 1990.
Hartmann, M., "Erasable Magneto-Optical Recording Media", IEEE Transactions on Magnetics, vol. Mag-20, No. 5, Sep., 1984, pp. 1013-1018.
Kobori, et al., New Magneto optic Head With a Built-in Generator for a Bias Magnetic Field, Applied Optics, vol. 27, No. 4, Feb. 15, 1988, pp. 698-702.
Kobori, Murakami, et al., "New Magneto-Optic Head with a Built-In Generator for a Bias Magnetic Field", Optical Data Storage Conference, Technical Digest Series vol. 10, Mar. 11-13, 1987, pp. 186-189.
Murakami et al., "Magnetooptic erasable disk memory with two optical heads", Applied Optics, vol. 25, No. 22, Nov. 15, 1986, pp. 3986-3989.
Sander, I., "Digital Magneto-Optic Storage System", Topical Meeting on Optical Data Storage, Jan. 20, 1989, pp. THA2-1-THA2-4.
Yoshizumi, Keiichi, et al., Fast Access Actuator for Optical Disk Memory, SPIE, 1985.

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