Abstract: A wire-displacement detection device includes: a wire that drives a movable part through longitudinal movement thereof; a linear scale member that is shaped like a cylinder for allowing the wire to pass therethrough in a longitudinal direction thereof, the linear scale member including a first region not fixed to the wire and a second region fixed to the wire; a scale part disposed in the first region of the linear scale member; and a sensor that is disposed at a position facing the scale part, the sensor detecting longitudinal movement of the scale part.

Abstract: An image-blur correction device includes a vibration detection unit which detects vibrations of two different detection axes in a plane orthogonal to an optical axis, a correction unit which corrects vibration using a correction optical system which is displaced in directions of at least two correction axes different from the detection axes in the plane, a calculation unit that calculates amounts of displacements used to drive the correction optical system so that image-blur generated due to the vibrations is corrected based on amounts of vibrations obtained using the vibration detection unit, a coordinate conversion unit which rotates amounts of vibrations in the two detection axes relative to the corresponding at least two correction axes for conversion through calculations, and a restriction unit which restricts a driving range of the correction unit based on a displacement-amount restriction value obtained from a performance limitation region of the correction optical system.

Abstract: An image-blur correction device includes a vibration detection unit which detects vibrations of two different detection axes in a plane orthogonal to an optical axis, a correction unit which corrects vibration using a correction optical system which is displaced in directions of at least two correction axes different from the detection axes in the plane, a calculation unit that calculates amounts of displacements used to drive the correction optical system so that image-blur generated due to the vibrations is corrected based on amounts of vibrations obtained using the vibration detection unit, a coordinate conversion unit which rotates amounts of vibrations in the two detection axes relative to the corresponding at least two correction axes for conversion through calculations, and a restriction unit which restricts a driving range of the correction unit based on a displacement-amount restriction value obtained from a performance limitation region of the correction optical system.

Abstract: A shake compensation device includes a shake detection unit, a driving unit, and a calculation unit. The shake detection unit detects shake direction components of the shake in two different detection axes which are orthogonal to an optical axis, respectively. The driving unit drives a compensation member in directions of two driving axes. The directions of the driving axes are different from directions of the detection axes. The calculation unit calculates driving amounts based on detection result of the shake detection unit to drive the compensation member. The calculation unit performs to restrict a driving range of the compensation member in both directions of the detection axes and the driving axes.

Abstract: An image-blur correction device includes a vibration detection unit which detects vibrations of two different detection axes in a plane orthogonal to an optical axis, a correction unit which corrects vibration using a correction optical system which is displaced in directions of at least two correction axes different from the detection axes in the plane, a calculation unit that calculates amounts of displacements used to drive the correction optical system so that image-blur generated due to the vibrations is corrected based on amounts of vibrations obtained using the vibration detection unit, a coordinate conversion unit which rotates amounts of vibrations in the two detection axes relative to the corresponding at least two correction axes for conversion through calculations, and a restriction unit which restricts a driving range of the correction unit based on a displacement-amount restriction value obtained from a performance limitation region of the correction optical system.