Canon Kabushiki Kaisha

Shu Ito

Toshihiro Okuda

Kunihiko Sasaki

Toshinori Yamazaki

Tadanori Okada

Takehiko Sato

Toshimune Nagano

Hyochoru Tanaka

Takahiro Hatada

Makoto Nakahara

A lens apparatus includes a drive unit to drive a second lens barrel in an optical axis direction, a connection member to connect the second lens barrel and the drive unit, a movement base to hold the drive unit and move the drive unit in the optical axis direction with respect to a first lens barrel, and a second urging member to urge the movement base against the first lens barrel in a direction orthogonal to a plane passing through first, second, and third support portions. The connection member moves in a direction intersecting with a line connecting the first and second support portions. A moment by an urging force of the second urging member about an axis connecting the first and second support portions is greater than a moment by an urging force of the first urging member about the axis connecting the first and second support portions.

Lens apparatus, image capturing apparatus, and image capturing system

Provided is a lens barrel including: a fifth lens unit barrel; a fourth lens unit barrel; a linear ultrasonic motor configured to electrically drive the fourth lens unit barrel in an optical axis direction; a rack configured to transfer a driving force of the linear ultrasonic motor to the fourth lens unit barrel; a rack spring configured to bias the rack so that the rack is brought into contact with the fourth lens unit barrel; and a rack guide shaft. The rack guide shaft is fixed to the fourth lens unit barrel. The fourth lens unit barrel and the rack move together in the optical axis direction. When the fifth lens unit barrel is brought into contact with the fourth lens unit barrel, a relative position of the fourth lens unit barrel and the rack in the optical axis direction changes against a biasing force of the rack spring.

Optical apparatus and image pickup apparatus including the same

A lens apparatus includes: a first holder holding a first lens unit and being moved in optical axis direction manually or by an external driver; a second holder holding a second lens unit and being electrically moved in optical axis direction; a first and second detectors respectively detecting positions of the first and second holders; a driving unit configured to move the second holder in optical axis direction; and a controller controlling the driving unit, in which movable ranges of the first and second holders overlap each other in optical axis direction; in which a position of the second holder in optical axis direction corresponds to a position of a movable portion of the driving unit; and wherein the controller changes a control of the driving unit based on a detection of the first and second detectors before the second holder interferes with the first holder.

Lens apparatus, image pickup apparatus, control method for lens apparatus, and medium storing program

An apparatus including: a system including a correction lens unit configured to move to correct an aberration; a driving device configured to move the correction lens unit; an image pickup element configured to pick up an image formed by the system; an obtaining device configured to obtain an aberration based on a picked up image, through use of a learned model obtained by learning an image and aberration data of the system; and a controller configured to control the driving device based on the aberration, to thereby correct the aberration.

Image forming apparatus storing scan data in external memory non-transitory recording medium storing control program, and control method

Provided is an aberration correction method including: picking up images of a particular object at a plurality of focus positions including an in-focus position of the particular object; obtaining an aberration information based on the picked up images; and correcting an aberration based on the aberration information.

Aberration correction method, computer-readable storage medium, and image pickup apparatus

A lens apparatus includes an imaging optical system, a movable member holding at least one of lenses and configured to move in a direction including a component perpendicular to an optical axis of the imaging optical system, a fixed member whose movement in the direction is restricted, a coil provided at one of the movable member and the fixed member, a magnet provided at the other of the movable member and the fixed member, and a first shield member configured to cover at least a part of the coil as viewed in a direction parallel to the optical axis and as viewed in the direction perpendicular to the optical axis. At least a part of the first shield member being arranged closer to an image plane than the coil, and a predetermined conditional expression is satisfied.

Lens apparatus and imaging system including the same

An adaptor is attachable between an interchangeable lens including a first light amount adjustment unit capable of changing a passing area of image pickup light, and a camera main body including an image pickup element. The adaptor includes: a second light amount adjustment unit capable of changing transmittance of the image pickup light by using a change in a physical property; and a controller controlling the second light amount adjustment unit. In image pickup mode, the controller controls the transmittance in the second light amount adjustment unit depending on an operating amount of an operation unit by a user to adjust a light amount, and in the image pickup mode, the controller converts an instruction, transmitted toward the interchangeable lens from the camera main body, to drive the first light amount adjustment unit, into a drive completion signal, and transmits the drive completion signal to the camera main body.

Adaptor and camera system

An optical apparatus configured to guide light from an object to an image pickup element includes a first light amount adjustment unit configured to change transmissivity or the light from the object through change in physical property thereof. Then, in recording, a second light amount adjustment unit configured to mechanically change an area through which the light from the object passes is prevented from being driven but the first light amount adjustment unit is driven to adjust an amount of the light from the object entering the image pickup element.

Optical apparatus that reduces driving noised by adjusting light transmissivity and camera system

There is provided a lens hood that, when attached to a front end portion of a lens barrel, enables easy operation of an optical member attached to the front end portion of the lens barrel and is strong against external shocks. The lens hood attachable to the front end portion of the lens barrel includes a hood body with which an opening is formed, an opening cover member configured to cover the opening, and a cover support member configured to slidably fix the opening cover member to the hood body, wherein the hood body or the cover support member includes a plurality of abutted portions to be abutted by the opening cover member in the sliding direction.

Growing community of inventors

Utsunomiya, Japan

Shu Ito