Optical pickup device, and optical disc device

Details Optical pickup device, and optical disc device Optical pickup device, and optical disc device

2009-05-12

2009-12-08

Ben, Loha (Department: 2873)

Optical: systems and elements

Lens

With support

C359S824000, C359S637000, C359S694000, C359S696000, C396S075000, C720S666000, C250S201500, C355S062000

Reexamination Certificate

active

07630152

ABSTRACT:
A guide shaft and a guide portion movably guide a lens holder for holding a collimator lens (i.e. correction lens) in an optical axis direction. A stepping motor rotates a screw shaft arranged in parallel to the optical axis direction. A nut member converts a rotating movement of the screw shaft into a rectilinear movement of the optical axis direction. An urging spring urges the lens holder against the guide shaft and the guide portion. The lens holder is driven in the optical axis direction along the guide shaft by the stepping motor, with a first contact portion and a second contact portion of the lens holder being contacted with the guide shaft, and a third contact portion of the lens holder being contacted with the guide portion by an urging force of the urging spring. The optical pickup device having the above arrangement allows for stable driving of a correction lens.

REFERENCES:
patent: 3486807 (1969-12-01), Pignone
patent: 5491684 (1996-02-01), Terashima et al.
patent: 5768027 (1998-06-01), Takahashi
patent: 6473567 (2002-10-01), Nakashima
patent: 7486452 (2009-02-01), Kinoshita et al.
patent: 2003-45068 (2003-02-01), None
patent: 2003-91847 (2003-03-01), None
patent: 2006-107587 (2006-04-01), None

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