Electrodynamic device for translating an objective

Details Electrodynamic device for translating an objective Electrodynamic device for translating an objective

1983-03-04

1984-04-17

Budd, Mark O.

Electrical generator or motor structure

Dynamoelectric

Linear

310 17, H02K 4100

Patent

active

044437218

ABSTRACT:
An electrodynamic device translates an objective 1 along a path 4 in a radial direction relative to the axis of rotation 2 of an optical disc 3 and comprises a slide 6 on which the objective is arranged and a parallel-guide arrangement along which the slide is movable. It also comprises two stator magnets 7A and 7B, arranged on a stator yoke of a magnetizable material, and two drive coils 8A and 8B which are connected to the slide 6 and which can be translated in the magnetic field of the stator magnets. The slide 6 is movable on two guide rods 8A and 9B of a magnetizable material, which rods provide the parallel guidance of the slide 6 and also serve as parts of the stator yoke, air gaps 12A and 12B being formed between the permanent magnets and the drive coils being arranged around the guide rods.

REFERENCES:
patent: 3495147 (1970-02-01), Flora
patent: 3525887 (1970-08-01), D'Ewart, Jr.
patent: 3984706 (1976-10-01), Inouye
patent: 4023056 (1977-05-01), Yamada et al.
patent: 4259602 (1981-03-01), Kuribayashi et al.
patent: 4260914 (1981-04-01), Hertrich
patent: 4377761 (1983-03-01), Staciokas

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