Optical: systems and elements – Lens – With support
Patent
1998-04-30
1999-07-06
Ben, Loha
Optical: systems and elements
Lens
With support
359814, 369 4414, G02B 702
Patent
active
059204370
ABSTRACT:
An objective lens driving apparatus comprises a lens holder supporting an objective lens, a support shaft which enables the lens holder to be contactingly movable in the focusing direction and rotatable in the tracking direction, a driving coil for focusing and a driving coil for tracking which are mounted on the outer surface of the lens holder in the circumference direction, an outer yoke which is positioned opposite from the outer surface of the lens holder and first and second arched magnets which are mounted on the inner surface of the yoke in the circumference direction. The driving coil for focusing is a hollow coil which is positioned such that its hollow core lies in the focusing direction wherein an inner yoke mounted on the outer yoke passes through the hollow core. The driving coil for tracking being a hollow coil which is positioned such that its hollow faces from the outer surface of the lens holder to the inner surface of the outer yoke.
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patent: 4998802 (1991-03-01), Kasuga et al.
patent: 5105405 (1992-04-01), Hashimoto et al.
patent: 5317552 (1994-05-01), Yamasaki
patent: 5388086 (1995-02-01), Yamasaki et al.
patent: 5506732 (1996-04-01), Mori
patent: 5513047 (1996-04-01), Matsui
Ben Loha
Sankyo Seiki Mfg. Co. Ltd.
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