Abstract: A drive unit includes an ultrasonic actuator having an actuator body formed using a piezoelectric element, and a driving element provided on the actuator body and configured to output a driving force by moving according to the vibration of the actuator body, and a control section configured to induce the vibration in the actuator body by applying a first and a second AC voltages having a same frequency and different phases to the piezoelectric element. The control section adjusts the first AC voltage and the second AC voltage so that the first AC voltage and the second AC voltage have different voltage values from each other.

Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.

Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.

Abstract: A drive unit includes an ultrasonic actuator having an actuator body formed using a piezoelectric element, and a driving element provided on the actuator body and configured to output a driving force by moving according to the vibration of the actuator body, and a control section configured to induce the vibration in the actuator body by applying a first and a second AC voltages having a same frequency and different phases to the piezoelectric element. The control section adjusts the first AC voltage and the second AC voltage so that the first AC voltage and the second AC voltage have different voltage values from each other.

Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.

Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.

Abstract: A drive unit includes: a shaft; a movable body supported by the shaft so as to be displaceable along the shaft; a vibratory actuator configured to drive the movable body; and a support body configured to support the vibrator actuator. The vibratory actuator includes an actuator main body that contacts the movable body and is configured to vibrate to output a driving force to the movable body, an opposing member that contacts the movable body and is positioned so as to face the actuator main body with the movable body interposed therebetween, and a coupling member that is configured to couple the actuator main body with the opposing member and to bias the actuator main body and the opposing member so as to sandwich the movable body therebetween with the movable body kept displaceable along the shaft. The support body supports the vibratory actuator so that the vibratory actuator is displaceable along a biasing direction of the coupling member.

Abstract: A drive unit includes a lens frame configured to support a lens, a movable body located outside the lens and configured to be movable with the lens frame, and a vibratory actuator configured to drive the movable body. The vibratory actuator includes an actuator main body contacting the movable body, an opposite member provided at a position which is opposite to the actuator main body so that the movable body is sandwiched between the actuator main body and the opposite member, and a connecting member configured to connect the actuator main body and the opposite member and to bias them toward the movable body. The connecting member is not provided at a side of the movable body where the lens frame is provided, but is provided at an opposite side of the movable body to the side where the lens frame is provided, as viewed in the optical direction.

Abstract: An ultrasonic actuator (2) includes an actuator body (4) which performs a longitudinal vibration and a bending vibration, and a driver element (8a, 8b) which is provided on one of side surfaces of the actuator body (4) which is a mounting surface (40a), and performs an orbital motion in accordance with the vibrations of the actuator body (4) to output a driving force. The driver element (8a, 8b) includes a first driver element (8a) and a second driver element (8b) which are provided on the mounting surface (40a) at different positions in a longitudinal direction of the actuator body (4). The first driver element (8a) and the second driver element (8b) are located at different positions in a thickness direction of the actuator body (4).

Abstract: A supporting structure for an actuator body, which can prevent reduction of vibration of an actuator body and maintain a contact state of a driver element with an abutment body in a stable manner even when the driver element receives reactive force from the abutment body is realized. An ultrasonic actuator (2) includes an actuator body (4) for generating vibration, driver elements (8), provided on a mounting surface (40a) of the actuator body (4), for outputting driving force, a pressing rubber (62) for pressing the actuator body (4) to a stage (11), a case (5) to which the actuator body (4) is coupled, and a plate spring (61) for elastically supporting the actuator body (4) relative to the case (5). The plate spring (61) supports the mounting surface (40a) of the actuator body (4) on which the driver elements 8 are provided.

Abstract: An ultrasonic actuator (2) includes an actuator body (4) which performs a longitudinal vibration and a bending vibration, and a driver element (8a, 8b) which is provided on one of side surfaces of the actuator body (4) which is a mounting surface (40a), and performs an orbital motion in accordance with the vibrations of the actuator body (4) to output a driving force. The driver element (8a, 8b) includes a first driver element (8a) and a second driver element (8b) which are provided on the mounting surface (40a) at different positions in a longitudinal direction of the actuator body (4). The first driver element (8a) and the second driver element (8b) are located at different positions in a thickness direction of the actuator body (4).

Abstract: The drive efficiency of a vibratory actuator is improved without increasing a weight of a driver element. An ultrasonic actuator (2) includes an actuator body (4) for generating longitudinal vibration and bending vibration, and driver elements (8), provided on a mounting surface (40a) which is one of side surfaces of the actuator body (4), for making an orbit motion according to the vibrations of the actuator body (4) to output driving force. In the driver element (8), a through hole (80) is provided.

Abstract: A vibratory actuator is provided in which a movable body can be stably driven even when a groove is formed in an abutment body by the friction between the driver element and the abutment body. An ultrasonic actuator (2) includes an actuator body (4) which performs a longitudinal vibration and a bending vibration, and a driver element (8a, 8b) which is provided on one of side surfaces of the actuator body (4) which is a mounting surface (40a), and performs an orbital motion in accordance with the vibrations of the actuator body (4) to output a driving force. The driver element (8a, 8b) includes a first driver element (8a) and a second driver element (8b) which are provided on the mounting surface (40a) at different positions in a longitudinal direction of the actuator body (4). The first driver element (8a) and the second driver element (8b) are located at different positions in a thickness direction of the actuator body (4).

Abstract: A drive unit includes an actuator main body configured to vibrate to output a driving force, a movable body, which is contacted by the actuator main body and is movable relative to the actuator main body in a predetermined moving direction, and an opposing member positioned to face the actuator main body with the movable body interposed therebetween and hold the movable body together with the actuator main body so that the movable body is sandwiched therebetween. A portion of the movable body, which contacts the opposing member, has an elastic modulus lower than that of the opposing member.

Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.

Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.

Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.

Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.

Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.

Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.