The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 1992
Filed:
Sep. 10, 1990
Hitachi, Ltd., Tokyo, JP;
Hitachi Video Engineering, Incorporated, Yokohama, JP;
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.