Optical device using a resilient member

Details Optical device using a resilient member Optical device using a resilient member

1990-09-10

1992-04-28

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4415, 369 4416, 369 4422, G11B 700

Patent

active

051093685

ABSTRACT:
An optical pickup device having a dust blocking function according to the present invention includes a casing having an opening therein, an optical system disposed within an interior of the casing and having photoelectric elements optically coupled with each other, an objective lens disposed inside the opening as spaced from an edge of the opening to be optically coupled with the optical system, driving device for moving the objective lens to a desired position, and a resilient member for sealing a gap between the edge of the opening and the object lens, whereby the resilient member enables movement of the object lens while preventing any intrusion of dust into an interior of the pickup device having the optical system incorporated therein.

REFERENCES:
patent: 4032776 (1977-06-01), Van Rosmalen
patent: 4252412 (1981-02-01), Camenk
patent: 4422169 (1983-12-01), Vitale et al.
patent: 4507765 (1985-03-01), Suzuki et al.
patent: 4773055 (1988-09-01), Gyzen et al.
patent: 4782476 (1988-11-01), Sekimoto et al.

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