Lens driving apparatus

Details Lens driving apparatus Lens driving apparatus

2008-07-01

2008-07-01

Hasan, Mohammed (Department: 2873)

Optical: systems and elements

Lens

With support

C359S694000, C359S823000

Reexamination Certificate

active

07394603

ABSTRACT:
A lens driving apparatus includes: a first yoke having an inner peripheral wall and an outer peripheral wall placed to be concentric with each other and forming a rectangular U-shape cross section and a cylindrical shape; a second yoke placed at an outer side of the first yoke to be concentric with the first yoke and forming a rectangular U-shape cross section and a cylindrical shape; a base; a first magnet and a first coil arranged in a rectangular U-shape interior of the first yoke; a second magnet and a second coil arranged in a rectangular U-shape interior of the second yoke; a first lens support member; and a second lens support member. The second lens support member is placed at an inner peripheral side of the second yoke and has the second coil fixed onto an outer periphery thereof. The first lens support member is linearly moved in a direction of an optical axis of a lens by an electromagnetic force caused by passing current through the first coil. The second lens support member is linearly moved in a direction of an optical axis of a lens by an electromagnetic force caused by passing current through the second coil.

REFERENCES:
patent: 4785210 (1988-11-01), Maruyama et al.
patent: 2001/0028516 (2001-10-01), Noguchi
patent: 2005/0174657 (2005-08-01), Honsho

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