An optical device with an imaging device for forming an image of a subject
with a lens device includes a lens unit, a movable member making the lens
unit movable within a plane orthogonal to the optical axis of the lens
unit, an image pickup device imaging the subject image formed by the lens
device, a fixed member limiting the movement of the movable member in the
optical axis direction, at least three balls rolling between the movable
and fixed member, a vibration detecting unit, and pitch and yaw direction
drive units for driving the movable member in the pitch and yaw
directions within the optical axis orthogonal plane, respectively. The
pitch and yaw direction drive units press the movable member toward the
fixed member side by means of magnetic pressing forces caused by magnetic
attractive action between drive magnets and yokes.