Canon Kabushiki Kaisha

Hiroshi Akada

Masanori Ishikawa

Katsuhiro Inoue

Jun Sugita

Sawako Ito

Tatsuo Chigira

Junichi Murakami

Masao Mizumaki

Hironori Takano

Hiroshi Yamamoto

Akihiko Nagano

Kazuhiro Noguchi

Makoto Miyawaki

Masahiko Tsuzuki

Hidekage Sato

Chifuyu Inagaki

Chifuyu Tomita

A motor driving apparatus includes a motor and a control circuit that controls driving of the motor. The motor includes a rotor having a cylindrical magnet having an outer peripheral surface circumferentially divided and alternately multi-polar magnetized to different poles, a first and second yokes having first and second magnetic pole portions arranged opposed to the outer peripheral surface, a first and second coils energized to excite the first and second magnetic pole portions, respectively. Directions of energizing the first and second coils are switched based on outputs from magnetic sensors that detect a rotational position of the rotor to change excited poles of the first and second magnetic pole portions. The rotor is started from a stopped state, after performing direct current energization to move the rotor to a position dependent on the direct current energization.

Motor driving apparatus capable of reliably starting motor, and method of controlling same

A display apparatus includes a display unit configured to display image information, and a plurality of image pickup units configured to be capable of picking up a user who observes image information of the display unit arranged on a rear surface of a display surface of the display unit, wherein the plurality of image pickup units is two-dimensionally arranged, and an array pitch in a vertical direction of the image pickup units is wider than an array pitch in a horizontal direction.

Display apparatus equipped with image pickup apparatus

An image pickup apparatus includes a camera bodyincluding a monitor unit, a lens barreland a lens bodywhich include an image pickup optical system L, a rotary portionprovided between the camera bodyand the lens body, and rotatably supporting the lens bodywith respect to the camera body, absorption portionsandattached to the camera body, and a cover portionmovably connected with respect to the camera bodyand covering the absorption portionsand

Image pickup apparatus

The motor driving apparatus includes a motor driving a driven member, and a controller performing, from a start of driving of the motor, acceleration drive of the motor on the basis of a predetermined acceleration pattern with open-loop control, and then perform, in response to increase of a driving speed of the motor or the driven member to a predetermined speed, drive of the motor with feedback control. The controller changes the predetermined acceleration pattern and the predetermined speed depending on a magnitude of a load acting on the motor or the driven member.

Motor driving apparatus and optical apparatus

An optical apparatus is disclosed which can prevent displacement of subject images due to an initializing operation of the image stabilizing unit from being seen by a photographer through a finder. The apparatus comprises an image-stabilizing unit which includes a movable unit movable for image stabilization and balls movable in conjunction with the movement of the movable unit, and a controller which controls operations of the movable unit. The controller causes the movable unit to perform a specific operation for moving the balls to a specific position in response to mounting of the optical apparatus on another optical apparatus, the specific operation being a different operation from an image stabilization operation of the image-stabilizing unit.

Optical apparatus that prevents displacement of subject images due to an initializing operation

A light-amount adjusting apparatus includes a plurality of light-amount adjusting blades that causes a size of a light-passing aperture to change by rotation thereof. Each of the light-amount adjusting blades includes a base portion on which a rotation center portion and a driven portion are formed, and a blade portion that overlaps another light-amount adjusting blade in a light-passing direction so as to form the light-passing aperture. A thickness of the blade portion is thinner than that of the base portion. When the plurality of light-amount adjusting blades is rotated to set the light-passing aperture to be smaller than a full-opened aperture, a thickness of a portion that overlaps an adjacent stop blade is thinner than that of a portion that does not overlap the adjacent stop blade in each of the light-amount adjusting blades. The blades have high dimension accuracy, and deterioration of the optical performance of the apparatus is reduced.

Light-amount adjusting apparatus, optical apparatus, and method for manufacturing the light-amount adjusting apparatus

An optical apparatus includes a photographic optical system including an image stabilizing unit supported by a support member via a plurality of elastic members, an actuator configured to drive the image stabilizing unit in a direction perpendicular to an optical axis thereof, a position detection unit configured to detect a position in the direction perpendicular to the optical axis of the image stabilizing unit, a gravitational direction determination unit configured to determine a gravitational direction based on an output from the position detection unit, a setting unit configured to set a holding position at which the image stabilizing unit is held based on information concerning the gravitational direction output from the gravitational direction determination unit, and a control unit configured to control the actuator based on information concerning the holding position to move the image stabilizing unit to the holding position.

Lens apparatus and camera

The invention relates to an optical apparatus having a vibration detector that detects vibration, a holding member that holds an image stabilizing optical system, an elastic member that elastically supports the holding member so that the holding member can shift within a plane perpendicular to an optical axis, a drive unit that generates a drive force resisting against an elastic force of the elastic member, a drive circuit that drives the drive unit, a control circuit that controls the position of the holding member, a temperature sensor that measures temperature, and a viscous damper that damps movement of the holding member in the drive direction. The control circuit changes the image stabilizing drive control characteristic of the drive circuit to compensate for changes in viscosity of the viscous damper with temperature.

Optical apparatus with stabilization control based on temperature

The image-pickup apparatus includes a controller that controls the energization of the actuator for driving the aperture stop. The controller receives from a lens apparatus information on a time period for controlling the energization of the actuator, the information being set corresponding to the type of the actuator. During an image-pickup period in a state in which the aperture stop has been driven to a target aperture position, the controller outputs to the lens apparatus an instruction for stopping the energization of the actuator or reducing the energization amount thereof in response to the elapse of the time period. This can reduce power consumption.

Image-pickup apparatus, lens apparatus and image-pickup system

An optical apparatus is disclosed which can prevent displacement of subject images due to the initializing operation of the image stabilizing unit from being seen by a photographer through a finder. The apparatus comprises an image-stabilizing unit which includes a movable unit movable for image stabilization and balls movable in conjunction with the movement of the movable unit, and a controller which controls operations of the movable unit. The controller causes the movable unit to perform a specific operation for moving the balls to a specific position within a disappearance period of a subject image in a finder for observing the subject, the specific operation being a different operation from an image stabilization operation of the image-stabilizing unit.

Optical apparatus for correcting vibration using ball-guides and method of resetting thereof

An optical device includes a base member, an image-stabilizing lens, a lens holding member mounted to the base member and configured to hold the image-stabilizing lens, a driving unit configured to drive the lens holding member in a direction orthogonal to an optical axis, a plurality of elastic members fixed between the base member and the lens holding member, a vibration detecting unit configured to detect vibration, and a control circuit configured to control the position of the lens holding member on the basis of vibration information from the vibration detecting unit. The center position of the driving range of the image-stabilizing lens is controlled on the basis of vibration information obtained during a predetermined period between the time when a first trigger signal is input and the time when a second trigger signal is input.

Optical device and camera system

An image blur correction apparatus which can be reduced in size is disclosed. The image blur correction apparatus has a base member which is moved in a direction of an optical axis with respect to a member extended in the direction of the optical axis and a lens hold member which is moved in a plane substantially orthogonal to the optical axis with respect to the base member. The base member has a concave portion on a periphery thereof through which the member extended in the direction of the optical axis passes and is provided with a support shaft closer to the optical axis than the concave portion, the support shaft supporting the lens hold member and the lens hold member has an engaging portion which engages with the support shaft to allow a movement of the lens hold member in the plane substantially orthogonal to the optical axis.

Image-blur correction apparatus, lens apparatus and optical device

A position control device having first and second movable members. A first detector outputs a position signal when the first movable member is looked in a first predetermined position in a first region. A second detector outputs a first signal when the second movable member is located in either tbe first region or a second region where it is released, and a second signal when the second movable member is located in a third region. A controller determines the region in which the second movable member is located based on the detector outputs and when the determined region is the first region, an actuator moves the second movable member to a second predetermined position in the first region, and when the determined region is the second or third region, the actuator moves the second movable member to the second predetermined position.

Position control device, image blur correction device, and optical apparatus

A movable camera apparatus including a camera unit and a pan head which has a movable portion and a fixed portion includes first and second support portions erected from the movable portion for supporting the camera unit from the opposite sides thereof for tilt rotation, a first circuit board disposed in the camera unit, a second circuit board disposed on the fixed portion, and a connecting member for connecting the first and second circuit boards together. The center of gravity of the camera unit is disposed near the center line of the tilt rotation, and tilt rotation driving means is provided on the first support portion, and the connecting member is disposed on the second support portion.

Growing community of inventors

Kawasaki, Japan

Hiroshi Akada