Patent ID: 8564675
Filing Date: 2013-10-22
Classification: G03B,H04N

Abstract:
1. An image-shake correction device for reducing image shake, the image-shake correction device comprising: a shift member configured to support a lens and to be able to move; a first driving unit configured to move the shift member in a first direction along a plane orthogonal to an optical axis; and a second driving unit configured to move the shift member in a second direction that is different from the first direction along the plane orthogonal to the optical axis, wherein each of the first and second driving units includes a magnet, a coil, and a yoke, a magnetic attractive force being generated between the yoke and the magnet, wherein the shift member is moved by energizing the coil, and wherein, to generate a magnetic attractive force for reducing a moment acting on the shift member due to the magnetic attractive force generated between the magnet and the yoke of the second driving unit when the first driving unit is driven, the yoke of the first driving unit is shaped such that when the yoke of the first driving unit is divided into two portions by a straight line parallel to the first direction and passing a middle of a width of the yoke of the first driving unit in a direction orthogonal to the first direction in the plane orthogonal to the optical axis, an amount of magnetic flux from the magnet of the first driving unit passing through the yoke of the first driving unit is larger in one of the two portions nearer to the second driving unit than in another of the two portions farther from the second driving unit.