Optical device using a resilient member
US5109368A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 10, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Sep 10, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0932
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.