Objective lens drive, optical pickup, and optical disc...

Details Objective lens drive, optical pickup, and optical disc... Objective lens drive, optical pickup, and optical disc...

2007-10-22

2010-11-09

Feild, Joseph H (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C720S683000

Reexamination Certificate

active

07830759

ABSTRACT:
An objective lens drive includes a lens holder holding first and second objective lenses and moved at least in a focusing direction substantially parallel to optical axes of the objective lenses and in a tracking direction orthogonal to the focusing direction; a support supporting the lens holder movably at least in the focusing and tracking directions; a first adjusting unit provided between the first objective lens and the lens holder and adjusting a tilt of the first objective lens in a direction about an axis in a first direction being any direction in a plane orthogonal to the focusing direction; and a second adjusting unit provided between the second objective lens and the lens holder and adjusting a tilt of the second objective lens in a direction about an axis in a second direction being in a plane orthogonal to the focusing direction and substantially orthogonal to the first direction.

REFERENCES:
patent: 7221523 (2007-05-01), Miyagi
patent: 7515364 (2009-04-01), Takahashi
patent: 2007/0165500 (2007-07-01), Sato
patent: 10-11765 (1998-01-01), None
patent: 2006-19001 (2006-01-01), None
patent: 2008-84368 (2008-04-01), None

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