Canon Kabushiki Kaisha

Kota Asano

Daisuke Shiraishi

Koji Sato

Makoto Hayakawa

Takehiko Sato

A vibration-type driving apparatus includes a vibrator unit including a vibrator in which vibration is excited by an electro-mechanical energy convertor and a holder configured to hold the vibrator, and a contact body in contact with the vibrator. The vibrator and the contact body move relative to each other when vibration at a frequency higher than an audible range is excited in the vibrator. A predetermined condition is satisfied.

Vibration-type driving apparatus and apparatus having the same

A lens apparatus includes an aperture stop, a driving device configured to drive the aperture stop, a storage storing a driving instruction value for driving the aperture stop, and a controller configured to perform control of the driving device based on the driving instruction value. The storage stores the driving instruction value, among a plurality of ones of the driving instruction value, by which an absolute value of a difference, between a target aperture value and an actual aperture value obtained by the control, that is largest with respect to a plurality of ones of the drive amount is minimized.

Lens apparatus and image pickup apparatus

A lens apparatus includes a fixed member having one of a click generator and a groove part in which a groove part is formed, an operation ring having the other of the click generator and the groove part, and rotatable relative to the fixed member, a click detector configured to detect contact between the click generator and the groove part, and a rotation detector configured to detect rotation of the operation ring. The groove part has groove portions and non-groove portions alternately arranged. The click generator is biased along an optical axis direction and is in contact with the groove part. The click detector and the rotation detector are disposed along the optical axis direction.

Lens apparatus and imaging apparatus

An optical apparatus includes an optical unit driven by an actuator, a holder configured to hold the optical unit, and an elastic member that contacts the holder via a first contacting portion and a second contacting portion, and contacts the optical unit via a connecting portion provided between the first contacting portion and the second contacting portion. The elastic member is spaced from the holder between the first contacting portion and the second contacting portion, and spaced from the optical unit between the first contacting portion and the connecting portion and between the connecting portion and the second contacting portion. Part of the elastic member opposite to the connecting portion that contacts the optical unit is spaced from the holder.

Optical apparatus including elastic damping member

A brushless motor includes a case fixed onto a yoke to cover an outer surface of the yoke except one end of the yoke in the axial direction, a frame fixed onto the one end of the yoke, a first bearing fixed onto the frame and configured to rotatably support a first end of a rotating shaft in the axial direction, a second bearing fixed onto the case, and configured to rotatably support a second end of the rotating shaft which is closer to the magnet than the first end, the second bearing including a receiving surface that contacts the second end in the axial direction, an energizing member configured to force the rotating shaft from a first bearing side to a second bearing side, and a wiring substrate disposed between the stator and the case in the axial direction and configured to electrify the coil.

Brushless motor and apparatus using the same

A lens apparatus attached to and detached from an image pickup apparatus includes a diaphragm unit, a driver configured to drive the diaphragm unit, and a lens controller configured to communicate with the image pickup apparatus to which the lens apparatus is attached, and to control the driver based on aperture driving instruction information or aperture stop time request received from the image pickup apparatus. The lens controller is configured to send to the image pickup apparatus time information necessary to drive the diaphragm unit according to the aperture driving instruction information or aperture stop time request, during a period that starts when the driver starts driving the diaphragm unit and ends when the driver stops driving the diaphragm unit.

Lens apparatus, image pickup apparatus, and image pickup system

A stepping motor includes a rotor having a rotor magnet fixed to a rotating shaft, a plurality of coil bobbins where coils are wound, a stator yoke group having a plurality of stator yokes each of which surrounds each of the plurality of coil bobbins in an axial direction and a radial direction of the rotating shaft, and the plurality of stator yokes each having pole teeth alternately arranged in a circumferential direction around the rotating shaft so as to be opposed to a side surface of the rotor magnet, and a magnetic attractive force generating member configured to attract the rotor magnet to the axial direction of the rotating shaft by a magnetic attractive force, and a magnetic center of the rotor magnet and a magnetic center of the stator yoke group coincide with each other.

Stepping motor, lens apparatus, and image pickup apparatus

A lens apparatus includes a diaphragm unit that is driven in a first driving direction and a second driving direction, a driving unit that drives the diaphragm unit based on a driving instruction, a storage unit that stores a first driving instruction value for performing the driving in the first driving direction, and a second driving instruction value for performing the driving in the second driving direction, and a control unit that outputs a driving instruction for driving the diaphragm unit, wherein the control unit outputs, when driving the diaphragm unit in the first driving direction, the driving instruction based on the first driving instruction value or the like, and outputs, when driving the diaphragm unit in the second driving direction, the driving instruction based on the second driving instruction value or the like.

Lens apparatus and image capturing apparatus including the same

A lens apparatus includes an imaging optical system including a movable lens unit, a drive unit configured to drive the movable lens unit, and a control unit configured to cause the movable lens unit to perform a wobbling motion in an optical axis direction by alternatively outputting to the drive unit a first drive command for driving the movable lens unit at a first driving speed and a stop command for stopping driving of the movable lens unit, and to move the movable lens unit based on contrast information obtained from an image pickup unit during the wobbling motion of the movable lens unit, wherein, at least one of before and after outputting the first drive command to the drive unit, the control unit outputs to the drive unit a second drive command for driving the movable lens unit at a second driving speed lower than the first driving speed.

Lens apparatus and imaging apparatus including the same

The motor drive apparatus includes a driven member, a stepping motor to drive the driven member, a driver to produce a drive signal for driving the stepping motor and whose signal value periodically changes, a memory to store data for setting a reference signal value as the signal value and a target movement amount of the driven member for each one-step drive of the stepping motor to be driven according to the drive signal having the reference signal value, and a detector to detect an actual movement amount of the driven member for each one-step drive of the stepping motor actually driven according to the drive signal having the reference signal value. The driver changes the signal value of the drive signal from the reference signal value to another signal value so as to reduce difference between the target movement amount and the actual movement amount.

Motor drive apparatus and optical apparatus

A lens barrel includes a first lens set configured to move manually along an optical axis, a second lens set configured to move electrically along the optical axis, a first holding member configured to hold the first lens set, a second holding member configured to hold the second lens set, a driving member configured to move the second holding member along the optical axis, a transmitting member configured to transmit a driving force of the driving member to the second holding member, and an urging member configured to relatively urge the transmitting member and the second holding member along the optical axis. The first lens set is movable within a range of motion of the second lens set. The urging member is displaced when the second holding member interferes with the first holding member.

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Utsunomiya, Japan

Kota Asano