Optical pickup unit and optical disc apparatus

Details Optical pickup unit and optical disc apparatus Optical pickup unit and optical disc apparatus

2007-01-31

2010-06-29

Hindi, Nabil Z (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

Reexamination Certificate

active

07746733

ABSTRACT:
An optical pickup unit is disclosed which comprises: an objective lens that focuses laser light on an optical disc; a lens holder that holds the objective lens; a coil that is fitted on the lens holder and capable of driving the lens holder; and a heat transfer improving member that is fitted on the holder to cause heat to be radiated, wherein the heat is generated in the coil when the coil is energized.

REFERENCES:
patent: 7032231 (2006-04-01), Cheong et al.
patent: 7420891 (2008-09-01), Ochi et al.
patent: 2004/0062183 (2004-04-01), Cheong et al.
patent: 1485830 (2004-03-01), None
patent: 9-120573 (1997-05-01), None
Chinese Office Action for Application No. 200710007974.2 (with English translation) dated Nov. 20, 2009, 9 pages.

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