发明名称 |
Optical device using a resilient member |
摘要 |
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.
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申请公布号 |
US5109368(A) |
申请公布日期 |
1992.04.28 |
申请号 |
US19900579975 |
申请日期 |
1990.09.10 |
申请人 |
HITACHI, LTD.;HITACHI VIDEO ENGINEERING, INCORPORATED |
发明人 |
OHTA, HIROAKI;YABE, AKIO;SAITO, AKIRA |
分类号 |
G11B7/12;G11B7/09 |
主分类号 |
G11B7/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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