Optical information recording reproducing apparatus with first a

Details Optical information recording reproducing apparatus with first a Optical information recording reproducing apparatus with first a

1994-06-17

1996-01-30

Young, W. R.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

359814, 359824, 369 4416, G11B 7095

Patent

active

054886031

ABSTRACT:
An optical information recording/reproducing apparatus for optically writing and reproducing information on a disk-shape recording medium according to the present invention includes: a base; an objective lens for converging a light beam on the disk-shape recording medium, an optical axis of the objective lens being perpendicular to the disk-shape recording medium; an actuator for actuating the objective lens along an optical axis direction in which the optical axis of the objective lens extends and along a radial direction of the disk-shape recording medium, wherein the actuator is fixed on the base and includes a lens holder for supporting the objective lens, and a first electrokinetic type transducer and a second electrokinetic type transducer for driving the lens holder along the optical axis direction and/or the radial direction of the disk-shape recording medium, the first and second electrokinetic type transducers interposing the lens holder, and a distance between the first electrokinetic type transducer and the base being different from a distance between the second electrokinetic type transducer and the base; and an optical member for directing a light beam to travel between the first electrokinetic type transducer and the base and to be incident on the objective lens.

REFERENCES:
patent: 5373496 (1994-12-01), Tomita et al.

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