Optical system drive for optical recording/reproducing apparatus

Details Optical system drive for optical recording/reproducing apparatus Optical system drive for optical recording/reproducing apparatus

1984-10-31

1987-06-02

Corbin, John K.

Cryptography

Communication system using cryptography

350247, 369 45, G02B 2610

Patent

active

046698230

ABSTRACT:
An apparatus for electromagnetically driving an objective in conformance with movements of an optical disc in the vertical direction and deviations from track possibly produced in rotation of the disc, to thereby accomplish an automatic focussing of a write and/or read light beam on the disc. A driven unit including the objective lens system is supported by closely wound coil springs for suppressing unwanted resonance which will otherwise be produced in the driving operation. The apparatus is effective for controlling the focussed position of the light beam both in recording and reproducing modes. The spring coils are integrally mounted on a stationary mounting member by molding.

REFERENCES:
patent: 1588900 (1926-06-01), McGrath
patent: 4117997 (1978-10-01), Gitzendanner
patent: 4495407 (1985-01-01), Kodama et al.
patent: 4554653 (1985-11-01), Malissin et al.
patent: 4568142 (1986-02-01), Iguma

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