Patent ID: 8269841

Claim:
An optical element driving device comprising: an optical element holder that holds an optical element; a first magnet for moving the optical element holder; a second magnet for moving the optical element holder in a direction that is perpendicular to a direction in which the first magnet moves the optical element holder; a first magnetic body and a second magnetic body each having a cross section including a vertex and first and second legs extending from the vertex, the first and second legs having substantially an identical shape and forming an opening therebetween; a first piezoelectric element that moves the optical element holder by slidingly moving the first magnetic body by vibrating the first magnet; a second piezoelectric element that moves the optical element holder by slidingly moving the second magnetic body by vibrating the second magnet; a first magnetic sensor that detects a position of the optical element holder that is moved by driving the first piezoelectric element; and a second magnetic sensor that detects a position of the optical element holder that is moved by driving the second piezoelectric element, wherein the first piezoelectric element is driven in a state in which the first magnet is coupled to the first and second legs of the first magnetic body from the opening side, and the second piezoelectric element is driven in a state in which the second magnet is coupled to the first and second legs of the second magnetic body from the opening side, wherein the first magnet is magnetized in a direction perpendicular to a magnetization line that is a straight line connecting the vertex of the first magnetic body and a center of a cross section of the first magnet, and the second magnet is magnetized in a direction perpendicular to a magnetization line that is a straight line connecting the vertex of the second magnetic body and a center of a cross section of the second magnet, and wherein the second magnetic sensor is disposed at a position that is not on the magnetization line in a cross-sectional view of the first magnetic body.