Objective lens driving apparatus

Details Objective lens driving apparatus Objective lens driving apparatus

1990-04-17

1991-09-10

Arnold, Bruce Y.

Optical: systems and elements

Lens

With support

369 4415, 359824, G02B 702

Patent

active

050468200

ABSTRACT:
An objective lens driving apparatus has a base provided with focusing permanent magnets and tracking permanent magnets, a supporting shaft mounted on the base, a lens holder for holding an objective lens at an extension thereof, with the lens holder being rotatably and slidably fitted onto the supporting shaft at a position of the center of gravity of the lens holder and being provided with focusing coils and tracking coils. A plurality of substantially identical elastic members are stretched between the base and the lens holder in a plane substantially perpendicular to the supporting shaft and in axisymmetrical relation with respect to Y-axis line joining the supporting shaft and the objective lens and X-axis line substantially perpendicular to the Y-axis. Each of the elastic members is a spring formed by a lead wire extending to the focusing and tracking coils. The springs are secured to the base through a fiscous elastic material.

REFERENCES:
patent: 4566089 (1986-01-01), Kime
patent: 4592037 (1986-05-01), Ohnuki
patent: 4702555 (1987-10-01), Iguma et al.
patent: 4752117 (1988-06-01), Ichikawa et al.
patent: 4767187 (1988-08-01), Gijzen et al.
patent: 4912693 (1990-03-01), Goda
patent: 4948230 (1990-08-01), Kasahara et al.

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