Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2008-09-02
2008-09-02
Patel, Gautum R (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C720S679000, C720S682000
Reexamination Certificate
active
11108708
ABSTRACT:
An optical pickup device comprises a semiconductor laser that causes outgoing of laser beam used for reproduction and recording of information on an optical disk, and an objective lens that conducts the laser beam outgoing from the semiconductor laser to the optical disk. The objective lens is driven by a yoke, a focusing coil, a tracking coil, etc. These elements are accommodated in a pickup housing. First and second bearing portions supporting the pickup housing to make the same movable are attached to the pickup housing and arranged on both sides with the objective lens therebetween. The yoke is thermally connected to the first bearing portion positioned on an opposite side of the yoke to the semiconductor laser.
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Ochi Manabu
Taguchi Hirofumi
Toyoda Hiroyuki
Antonelli, Terry Stout & Kraus, LLP.
Hitachi Media Electronics Co. Ltd.
Patel Gautum R
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