Optical: systems and elements – Lens – With support
Patent
1996-08-12
1998-07-14
Ben, Loha
Optical: systems and elements
Lens
With support
359814, 369 4415, G02B 702
Patent
active
057813523
ABSTRACT:
An objective lens supporting device having its tracking sensitivity in the focusing direction improved by separating the center of gravity of the moving portion for the objective lens at the time when it moves in the focusing direction from each other and having vibration of the objective lens occurring when the device is subjected to an external force due to an acceleration accompanying a movement of the optical pickup suppressed, the objective lens supporting device, further, being quite excellent in the optical disk tracking characteristic of the optical pickup device and capable of achieving cueing of an information signal on an optical disk in a very short time. The object of the invention is achieved by a structure comprising a lens retaining member for retaining an objective lens, a support member for supporting the lens retaining member for movement along the optical axis of the objective lens, and a supporting base supporting the support member, supported on a bed plate by a hinge portion, and allowing the lens retaining member to move in the tracking direction, and having the center of gravity of the entire body of the moving portion supported by the hinge portion positioned on the axial line of the hinge portion and the center of gravity of the lens retaining member positioned on the optical axis of the objective lens.
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Chino Toshinori
Sugiura Hirotoshi
Tsuchiya Rikio
Ujiie Masahiko
Ben Loha
Minebea Co. Ltd.
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