Canon Kabushiki Kaisha

Kaishi Ohashi

Takayuki Tsukimoto

Toshifumi Urakami

Shinji Yamamoto

Yutaka Maruyama

Futoshi Hirose

Kohei Takeno

Makoto Kubota

Yasushi Shimizu

Takanori Matsuda

Tatsuo Furuta

Akira Sato

Kenichi Saito

Hiroshi Imamura

Toshihiro Ifuku

Masanori Sakai

Akira Shimada

Jumpei Hayashi

Hiroyuki Seki

Shoichi Yamazaki

Kei Suzuki

Toshiaki Sato

Koji Nozato

Tatsuya Koyama

Takashi Maeno

Hajime Kanazawa

Jumpei Ishibiki

Kenjiro Takemura

A drive device capable of reducing a possibility that magnets or contact members are broken by repulsive forces generated between magnets arranged in the Halbach array. The drive device includes magnet units each including a plurality of permanent magnets arranged in the Halbach array and a holding member that holds the permanent magnets, a fixed portion, a movable portion that is movable with respect to the fixed portion, and coils. The magnet units are supported by one of the fixed portion and the movable portion. The coils are supported by the other of the fixed portion and the movable portion in a manner opposed to the magnet units, respectively. The holding member has elastic shape portions in contact with the permanent magnets on surfaces thereof opposed to the permanent magnets in a magnet arrangement direction of the permanent magnets arranged in the Halbach array.

Drive device including magnet units arranged in Halbach array, shake correction device, and image capturing apparatus

A shutter apparatus includes a shutter base plate having an opening, a light shielding member movable to provide a closed state for closing the opening and an open state for opening the opening, and at least one processor or circuit configured to perform operations of a control unit configured to control the light shielding member configured to reciprocate relative to the opening so as to move the light shielding member in a first direction for a forward exposure and in a second direction opposite to the first direction for a return exposure. The control unit varies an exposure correction amount of the light shielding member between the forward exposure and the return exposure.

Shutter apparatus, imaging apparatus, control method of shutter apparatus, and storage medium

For reducing a time utilized in an AO process, provided is a deformable mirror system, including: a deformable mirror capable of changing a shape of a reflecting surface by a deformation amount in accordance with an input signal; a light wavefront measurement apparatus configured to measure a light wavefront shape of reflected light from the deformable mirror; a conversion factor calculation apparatus configured to calculate a conversion factor used in obtaining the input signal from a variation in light wavefront shape of the reflected light with respect to a change in input signal; a shape difference calculation apparatus configured to calculate a shape difference between the light wavefront shape measured by the light wavefront measurement apparatus and a light wavefront shape calculated from the input signal; and a conversion factor update unit configured to update the conversion factor in accordance with the calculated shape difference.

Deformable mirror system, control method therefor, and ophthalmic apparatus

A motor control apparatus for reducing the influence of magnetic fluxes from yokes on the switching of an energization direction. A rotor is rotatable and has a magnet. The magnet is circumferentially divided into a plurality of portions alternately multipolar magnetized to different poles. The coils are energized to excite the magnetic pole portions. Magnetic sensors output signals when detecting magnetic fluxes. Comparators output comparison result signals indicative of results of comparison between the output signals from the magnetic sensors and reference signals. A control circuit controls energization directions of the coils based on the comparison result signals. The control circuit changes the values of the reference signals according to a relationship between the polarities of the magnetic pole portions.

Motor control apparatus and motor control method for reducing influence of magnetic fluxes from yokes

An optical imaging apparatus includes a splitting unit configured to split return light, obtained by applying measurement light from a light source to an object to be examined via a measurement optical path, into a plurality of beams, a light receiving unit configured to measure intensities of the beams, a changing unit configured to change a ratio of signal components of as an image to be displayed based on the measured intensities of the beams, an angle specifying unit configured to specify an angle, and a generating unit configured to generate an image by calculation using the changed ratio of the signal components. The ratio of signal components of an image to be displayed based on intensities of beams is changed in accordance with information about a specified angle to generate an image of an object such that the direction of edge enhancement on the object is changed.

Optical imaging apparatus and method for controlling the same

An ophthalmic apparatus includes an AOSLO apparatus, a WFSLO apparatus, and a tracking processor that controls a tracking mirror based on position information calculated from AOSLO and WFSLO images. In another embodiment, the tracking processor controls the tracking mirror based on position information calculated from WFSLO images only. Depending on the amount of movement a target image with respect to a reference image, and the accuracy of detection thereof, the tracking mirror of either the AOSLO apparatus or the WFSLO apparatus can be selectively controlled according to a difference in position of the target image with respect to the reference image.

Method for robust eye tracking and ophthalmologic apparatus therefor

A vibration type driving apparatus including: a vibrator including an electro-mechanical energy conversion device; a driven body between the vibrator and a movable body and driven in a first direction by the vibrator; and a moving mechanism that allows the movable body to move in a second direction relative to the driven body, in which the second direction is a direction intersecting the first direction in a plane parallel to a plane where the vibrator and the driven body are in contact with each other.

Vibration type driving apparatus, two-dimensional driving apparatus, image-blur correction apparatus, interchangeable lens, image-pickup apparatus, and automatic stage

A vibration-type driving unit includes a vibrator including an electro-mechanical transducer; a moving body provided with the vibrator; a contact member in contact with the vibrator provided on the moving body; a support member configured to support the contact member; and a moving mechanism configured to move the moving body relative to the support member. The vibrator and the contact member are disposed so that the vibrator moves in a first direction relative to the contact member. The moving mechanism is configured to move the moving body relative to the support member in a second direction intersecting the first direction in a plane parallel to a plane in which the vibrator and the contact member are in contact with each other.

Vibration-type driving unit, two-dimensional driving apparatus, image-blur correction apparatus, interchangeable lens, image capturing apparatus, and automatic stage

An oscillatory wave drive unit includes at least one vibrator having an electromechanical energy converting element, and at least one supporting member configured to support the at least one vibrator. The oscillatory wave drive unit excites oscillation in the at least one vibrator and moves a moving body in contact with the at least one vibrator by frictional force. The oscillatory wave drive unit includes at least one moving mechanism configured to support the at least one vibrator movably in a plane parallel to the plane where the at least one vibrator and the moving body are in contact with each other, in a second direction intersecting with a first direction in which the at least one vibrator drives the moving body.

Oscillatory wave drive unit and image stabilization device

A vibration apparatus includes a vibrating body that includes a piezoelectric material having a lead content of less than 1000 ppm, and has an electromechanical energy converting element having an electrode; and a control unit that applies at least two driving voltages to the electromechanical energy converting element, and generates a combined vibration by providing a time phase difference to the vibrating body and generating multiple stable waves having mutually different orders; wherein the control unit changes at least one of the voltage amplitude ratio and time phase difference of at least two driving voltages, so as to change the amplitude distribution of the combined vibration.

Vibrating apparatus, driving apparatus having the vibrating apparatus, and optical device

A dust removing device includes an oscillation body including at least an elastic member and an electromechanical energy conversion element which is fixed to the elastic member, wherein the electromechanical energy conversion element is configured to excite oscillation in the elastic member to remove dust. A rigidity-increasing member configured to enhance rigidity of the oscillation body in the direction of a node line of the oscillation is provided on at least one of the elastic member and the electromechanical energy conversion element.

Foreign substance removing device and image pickup device

A vibration-wave driving device includes a vibrator having an electromechanical-energy converting element, and a moving mechanism configured to allow the vibrator to move relative to a movable body, in a plane parallel to a plane where the vibrator and the movable body are in contact, in a second direction intersecting with a first direction being a direction of a driving force produced by the vibrator. The moving mechanism includes a guide member that regulates a moving direction of the vibrator, and the guide member includes a member having a rollable curved portion.

Vibration-wave driving device, two-dimensional driving apparatus, and image-shake correcting apparatus

A foreign substance removal unit includes an optical member, disposed in an optical path, which is rectangular-shaped and in which an optical effective area for a light flux to pass through is set, and a piezoelectric element including a piezoelectric member, and a driving electrode, and a sensor electrode formed on a surface of the piezoelectric member. The piezoelectric element is stuck to a surface of the optical member outside the optical effective area and along one side of the optical member. The sensor electrode is formed on the surface of the piezoelectric member to be positioned within a range of the optical effective area in a side direction of the optical member to which the piezoelectric element is stuck.

Foreign substance removal unit and optical apparatus including foreign substance removal unit

A vibrating device includes a vibrator having multiple electromechanical energy converting elements, with the vibrating device generating a first standing wave and a second standing wave in the vibrator with a predetermined time phase difference. The first standing wave and the second standing wave having multiple nodal lines aligned in the same direction and being different in terms of an order. A first electromechanical energy converting element is disposed at a first portion, and a second electromechanical energy converting element is disposed at a second portion. The first portion extends in a first direction parallel to one of the multiple nodal lines, and the second portion extends in a second direction which crosses the first direction.

Vibrating device, and drive device, dust removing device, and optical device which include the vibrating device

A driving method causes a vibrator to generate standing waves different in order with a predetermined time phase difference. The vibrator has a first vibration mode in which plural nodal lines are arranged in a first direction, a second vibration mode in which a number of first-direction nodal lines is different from that in the first vibration mode and its natural frequency is higher than that of the first vibration mode, and a third vibration mode having a natural frequency between those of the first and second vibration modes. The vibrator is driven on condition that an excitation force applied to one of the first and second vibration modes, in which a difference between its natural frequency and the natural frequency of the third vibration mode is smaller, is made larger than that applied to the other thereof, in which a difference between its natural frequency and the natural frequency of the third vibration mode is larger.

Vibrator driving method, vibrating apparatus, driving apparatus having vibrating apparatus, foreign substance removing apparatus having vibrating apparatus, and optical apparatus having vibrating apparatus

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Tokyo, Japan

Kaishi Ohashi