Canon Kabushiki Kaisha

Tadanori Okada

Naoya Kaneda

Kunihiko Sasaki

Kazuhiro Noguchi

Masanori Ishikawa

Haruhiko Yamanouchi

Takehiko Sato

Toshihiro Okuda

Shu Ito

Toshimune Nagano

Akihisa Horiuchi

Masahisa Tamura

Hirofumi Takei

Shunji Iwamoto

Tatsuo Chigira

Toshihiro Ogawa

Yoshihiko Konno

Hideki Sakai

Tatsuya Sato

Masao Aoyagi

Shigeo Nakashima

Hiroyoshi Inaba

Katsumi Azusawa

Takumi Yamanaka

Shota Shimada

Masae Miyakawa

Hyochoru Tanaka

Yasushi Murakami

Takeya Nakayama

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

Provided is a lens including: a circumferential groove formed in an outer periphery of the lens; and a light-shielding ring, which is provided in the circumferential groove, and is configured to shield light, the light-shielding ring having a ring shape.

Optical element, optical apparatus, and image pickup apparatus

An optical apparatus capable of detecting an origin or the like even in a retracted state is provided. The optical apparatus includes a holding frame holding an optical system, an intermediate member, a driving unit moving the intermediate member in a direction along an optical axis of the optical system, a biasing member biasing the holding frame in a direction along the optical axis with respect to the intermediate member, and a detection unit detecting the intermediate member, and the optical apparatus also includes a first state in which a part of the holding frame is brought into contact with a part of the intermediate member according to a biasing force of the biasing member, and a second state in which the holding frame is separated from the intermediate member against the biasing force of the biasing member, in which the driving unit is able to move the intermediate member in a direction along the optical axis in either the first state or the second state, and the detection unit can detect the intermediate member at least in the second state.

Optical apparatus and camera system

The lens apparatus includes an optical system, a voltage transformation unit, and an actuator. A first lens unit of the optical system is moved toward the object side during zooming from a wide-angle end to a telephoto end. The voltage transformation unit includes coils. The actuator is configured to be driven by a voltage output from the voltage transformation unit and to move a part of the lens units in the optical system during focusing. The coil is disposed at a position that is separated from a position of a most object-side surface of the optical system at the wide-angle end, toward the image side by a maximum or more moving amount of the first lens unit, and is closer to the object side than a most image-side surface of the optical system at the wide-angle end.

Lens apparatus and camera system

A rotational force transmitting apparatus includes a cylindrical fixed member, a rotating member configured to rotate around the cylindrical fixed member, a first bearing member held by the cylindrical fixed member and configured to rotate around an axis parallel to a rotation axis of the rotating member, and a second bearing member held by the cylindrical fixed member and configured to rotate around a radial direction of the rotating member.

Rotational force transmitting apparatus, lens apparatus and imaging apparatus having the same

According to an aspect of the invention, the diaphragm apparatus includes: a plurality of diaphragm blades which define an aperture diameter; a driving member which includes a protrusion protruding in an optical axis direction, rotates around an optical axis, and drives the diaphragm blades to change the aperture diameter; and a base plate which includes a rail part with which the protrusion contacts to be movable in a direction of a rotation of the driving member. The plurality of diaphragm blades are disposed in a gap between the driving member and the base plate, the gap being defined when the protrusion and the rail part contact with each other. A size of the gap changes in accordance with the rotation of the driving member in the optical axis direction.

Diaphragm apparatus, lens apparatus, and imaging apparatus

The lens barrel includes an image-capturing lens unit, a mount portion including a mount member connectable to an image-capturing apparatus, and protrusion portions provided in the mount portion at multiple positions in a circumferential direction of the lens barrel. Each protrusion portion protrudes to an image side further than an image-side lens surface of a final lens disposed at a most image-side position in the image-capturing lens unit. The mount portion includes, inside the protrusion portions in a radial direction of the lens barrel, light-shielding portions capable of shielding light passing though the image-side lens surface toward inner circumferential surfaces of the protrusion portions.

Lens barrel and image-capturing apparatus

A zoom lens barrel comprises: a focus lens frame moves in an optical axis direction (inOAD) during zooming and focusing; a focus cam ring (FCR) rotates to move focus lens frame inOAD; a key member rotates to transmit torque to FCR; a zoom lens frame moves inOAD along with FCR; a zoom cam ring rotates to move zoom lens frame inOAD; a first rotation transmission portion (RTP) provided to FCR; and a second RTP provided to key member to be engaged with first RTP, in which cam grooves formed on zoom cam ring are engaged with rollers provided to zoom lens frame, respectively, focus lens frame moves inOAD when FCR rotates with rotation of key member during focusing, and focus lens frame moves inOAD along with zoom lens frame when FCR rotates with relative position change of first and second RTPs inOAD during zooming.

Zoom lens barrel and optical apparatus using the same

The optical apparatus includes a first holding member holding an optical element, a second holding member holding the first holding member, and an adjustment mechanism. The adjustment mechanism includes a fulcrum portion provided at one place in a circumferential direction and connecting the first and second holding member so as to allow movements of the first holding member in decentering and tilting correction directions with respect to the second holding member. The adjustment mechanism further includes two decentering adjustment portions arranged in the circumferential direction and each including a first adjusting member, and two tilting adjustment portions arranged in the circumferential direction and each including a second adjusting member. The first and second adjusting members each have an eccentric portion eccentric with respect to its rotation center portion.

Optical apparatus including decentering/tilting adjustment mechanism

A lens-interchangeable camera includes a focus detector performing focus detection and a controller performing a drive control of a lens based on a defocus amount. The controller finishes focusing operation without driving the lens when the defocus amount is out a range of a first in-focus determination width, and performs the focusing operation when the defocus amount is out a range of the first in-focus determination width. The controller finishes the focusing operation without performing the focus detection again after completing the drive when the defocus amount is out a range of a second in-focus determination width, and performs the focus detection again after completing the drive when the defocus amount is out a range of the second in-focus determination width. The second in-focus determination width is set to be greater than the first in-focus determination width and be greater than or equal to a drive limit value.

Lens-interchangeable camera performing focus control, lens barrel, and program

A light quantity control device includes a diaphragm for controlling an incident light quantity and an ND filter insertable into and retractable from an effective ray in a plane approximately perpendicular to an optical axis, and inserts the ND filter into the effective ray before small-aperture diffraction occurs, and also controls the amount of relative movement between the diaphragm and the ND filter to prevent occurrence of shading due to an edge of the ND filter and a variation in brightness during the insertion of the ND filter.

Image pickup apparatus

An image stabilizer for stabilizing an image against unexpected vibrations or shaking of a zoom lens includes a diaphragm arranged to vary its full-open-aperture diameter according to a magnification varying (zooming) action from a wide-angle end position to a telephoto end position of the zoom lens for the purpose of preventing variations in light quantity which more conspicuously take place in the peripheral part than in the central part of an image plane when an image stabilizing action is performed.

Variable magnification lens having image stabilizing function

An optical apparatus having a grip for gripping a camera body. The apparatus includes a lens element, a lens barrel configured to retain the lens element, a focus detection sensor disposed on an outer peripheral portion of the lens barrel, and a ring-shaped operation member configured to manually adjust at least focusing or zooming. The focus detection sensor is disposed on an outside of the ring-shaped operation member and on a same side as the grip of the camera body with respect to an optical axis of the lens element.

Optical apparatus

An optical apparatus is disclosed which comprises an optical system provided with a zoom lens for performing zooming by moving along the optical axis and a focus lens for performing correction and focusing at the time of zooming, an imaging device for imaging an optical image supplied from the optical system, a zoom actuator for driving the zoom lens, a focus actuator for driving the focus lens, a zoom position detecting device for detecting the position of the zoom lens, a focus position detecting device for detecting the position of the focus lens, an aperture stop member whose opening diameter changes so as to adjust the luminous energy passing through the optical system a filter member to be freely inserted into or extracted from the optical path of the optical system, an aperture stop state detecting device for detecting the opening state of the aperture stop member, a filter state detecting device for detecting the insertion state of the filter member, a memory storing the movement information on the relation between the position of the zoom lens for keeping a focused state and the position of the focus lens, and a control device for correcting the movement information in accordance with an output of the aperture stop state detecting device and an output of the filer state detecting device and controlling driving of the focus lens.

Growing community of inventors

Utsunomiya, Japan

Tadanori Okada