Olympus Corporation

Olympus Imaging Corporation

Satoshi Okawa

Atsushi Takahashi

Takeshi Kindaichi

Naoaki Tani

Yutaka Arakawa

Kento Hara

Tetsuya Hayashi

A shooting apparatus comprising: a focusing lens provided within a lens barrel including a shooting lens, the focusing lens being movable in an optical axis direction; a ring disposed so as to be rotatable with respect to the lens barrel; a rotation detector configured to detect a rotation amount and rotation direction of the ring; a controller configured to calculate, based on the rotation amount detected by the rotation detector, a moving speed of the focusing lens to control a movement of the focusing lens at the calculated moving speed in a predetermined cycle period and in accordance with the rotation direction.

Shooting apparatus and focusing method

An imaging apparatus, comprising a detection element that outputs analog signals in accordance with position of the operation member, an A/D converter that converts the analog signals to digital values, and a controller that detects position of the operation member, wherein the controller, when it is determined that the operation member is stopped, compares an average value of a first number of digital values with a first threshold value, and determines that the operation member is moving if it has been determined that the average value is greater than the first threshold value, and when it is determined that the operation member is moving, compares a difference between a newest digital value and a digital value that was acquired a second number previously with a second threshold value, and determines that the operation member has stopped if it is determined that the difference is smaller than the second threshold value.

Imaging apparatus and position detection method

A lens control apparatus having a focusing lens capable of moving in an optical axis direction provided within a lens barrel including a photographing lens, comprising; a ring rotatably disposed to the lens barrel; a memory storing a first relationship between a rotation angle of the ring and a value relating to a photographing distance corresponding to a first photographing distance area and a second relationship between a rotation angle of the ring and a value relating to a photographing distance corresponding to a second photographing distance area on a shorter distance side than the first photographing distance area; and a controller controlling a position in an optical axis direction of the focusing lens by selecting the first relationship or the second relationship in accordance with a rotation angle of the ring and calculating a value relating to a photographing distance in accordance with a rotation angle of the ring.

Lens control apparatus and lens control method

A photographing device, comprising a memory for storing relationships between movement of the focus adjustment lens and image plane movement amount, a controller for setting movement amount of the focus adjustment lens constituting a specified image plane movement amount with respect to unit rotation amount of the ring member, based on a relationship that is stored in the memory, and controlling movement of the focus adjustment lens in accordance with rotation amount and rotation direction of the ring member based on the movement amount, and a rotation velocity detector for detecting rotation velocity of the ring member, wherein the control section, when rotation velocity is smaller than a specified value, sets a movement amount of the focus adjustment lens constituting a specified image movement amount with respect to unit rotation amount of the ring member, based on a relationship that is stored in the storage section.

Photographing device and control method for photographing device

A photographing apparatus comprising: a focus adjustment lens which is provided within a lens barrel containing a photographing lens and is movable in an optical axis direction; a ring member disposed rotatably with respect to the lens barrel in an angle range from a first end point to a second end point; a storage unit to store a first relationship between a rotation angle of the ring member and a distance, and a second relationship between a position of the focus adjustment lens in the optical axis direction and the distance; and a control unit to calculate a distance corresponding to a rotation angle of the ring member according to a rotation angle of the ring member and the first relationship, and to set a position of the focus adjustment lens in the optical axis direction according to the distance and the second relationship.

Photographing apparatus and interchangeable lens control method

A photographing apparatus comprises a focus adjustment lens capable of movement in an optical axis direction, an operation member for designating a movement amount on movement direction of the focus adjustment lens as a result of being operated, an operation time detector for detecting operation time based on operation amount of the operating member, a target position calculation section for calculating target position that the focus adjustment lens is moved to, based on operation amount of the operating member, and a controller for changing the target position based on the operation time, and repeatedly executing control to move the focus adjustment lens to the target position, wherein the controller sets a movement velocity of the focus adjustment lens, at an estimated time for recommencing movement of the focus adjustment lens, so that the focus adjustment lens moves to the target position.

Photographing apparatus and control method for photographing apparatus

An imaging device, comprising an interchangeable lens having a photographing optical system whose focal length can be varied, comprises a zoom position detection section for detecting a zoom position in accordance with focal length of the imaging optical system, and a lens control section for controlling movement of a focus lens contained in the imaging optical system, wherein the lens control section corrects position that the focus lens is moved to in accordance with the zoom position before movement of the focus lens and zoom position during movement of the focus lens.

Imaging device, camera system, and control method for imaging device

An optical instrument of the present invention has a first lens group and a second lens group capable of moving in an optical axis direction in order to perform optical zooming, and comprises a storage section for storing first position information relating to positions of the first lens group and positions of the second lens group corresponding to identical focal lengths that fall within a focal length region range in which zoom operations of the optical instrument are carried out, and second position information relating to positions of the first lens group and positions of the second lens group corresponding to different focal lengths that fall within the focal length region, and establishes a second optical state of a higher shooting magnification than a first optical state, when establishing substantially the same focal length as a focal length of the first optical state based on the first position information.

Optical instrument

An optical instrument comprises a control section for driving a lens group in an optical axis direction, a first position detection section for detecting an absolute position of the lens group, a second position detection section for detecting a relative position of the lens group, and a storage section for storing first data corresponding to output of the second position detection section corresponding to a specified position, and second data corresponding to a target position, wherein, the control section acquires output of the second position detection section, at a point when a specified variation has occurred, as third data, calculates a stop target position based on the first data and the third data and executes a stop operation for the lens group to stop the lens group, and corrects output of the second position detection section in a state, based on the second data, and the stop target position.

Optical instrument, and control method for optical instrument

An optical instrument of the present invention comprises a first ZM group drive section for moving a first lens group, a second ZM group drive section for moving a second lens group, a storage section for storing positional information on position of the first and second lens groups corresponding to focal length, and storing information relating to the movement speed of the first and second lens groups, and a control section for controlling position of the first and second lens groups based on positional information of the first and second lens groups, and controlling the first and second drive sections so as to move the first and second lens groups by synchronizing the movement speed of the first and second lens groups based on information relating to movement speed of the first and second lens groups.

Optical instrument and imaging device

An optical device includes a first and second lens group, an operation member, a first and second lens group position detection unit, a storage unit, a control unit. The control unit controls the movement of the second lens group based on positional information of the first lens group detected by the first lens group position detection unit and the positional relationship information stored in the storage unit, and determines whether a control state of the second lens group is abnormal based on control positional information during the control of the movement of the second lens group and the signal corresponding to the position of the second lens group detected by the second lens group position detection unit.

Growing community of inventors

Hachioji, Japan

Satoshi Okawa