Control apparatus, lens apparatus, optical apparatus, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorFuya Mizuochi
Life of this patent
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Abstract
A control apparatus for use with an optical apparatus includes an acquiring unit configured to acquire focus information from the optical apparatus, and a control unit configured to control, according to the focus information, movements of a first focus lens and an element that are independently movable in an optical axis direction. The control unit performs first driving that moves the element so as to reduce an image-plane moving amount caused by a movement of the first focus lens in simultaneously moving the first focus lens and the element.
Claims13
A control apparatus for use with an optical apparatus, the control apparatus comprising at least one processor, and a memory coupled to the at least one processor, the memory having instructions that, when executed by the processor, perform operations as:
- an acquiring unit configured to acquire focus information from the optical apparatus;
- and
- a control unit configured to control, according to the focus information, movements of a first focus lens and an element that are independently movable in an optical axis direction,
- wherein the control unit performs first driving that moves the element so as to reduce an image-plane moving amount caused by a movement of the first focus lens in simultaneously moving the first focus lens and the element,
- wherein the element is a second focus lens provided in the optical apparatus, and
- wherein in the first driving, in a case where a difference between a current position of the second focus lens and a position of the second focus lens corresponding to a position of the first focus lens based on position characteristic data indicating a relationship between an object distance and the positions of the first focus lens and the second focus lens is equal to or larger than a first threshold, the control unit stops or decelerates the first focus lens and performs second driving that moves the second focus lens so as to reduce the difference.
A control method for an optical apparatus, the control method comprising:
- acquiring focus information from the optical apparatus;
- and
- controlling, according to the focus information, movements of a first focus lens and an element that are independently movable in an optical axis direction,
- wherein the controlling performs first driving that moves the element so as to reduce an image-plane moving amount caused by a movement of the first focus lens in simultaneously moving the first focus lens and the element,
- wherein the element is a second focus lens provided in the optical apparatus, and
- wherein in the first driving, in a case where a difference between a current position of the second focus lens and a position of the second focus lens corresponding to a position of the first focus lens based on position characteristic data indicating a relationship between an object distance and the positions of the first focus lens and the second focus lens is equal to or larger than a first threshold, stopping or decelerating the first focus lens and performs second driving that moves the second focus lens so as to reduce the difference.
A control apparatus for use with an optical apparatus, the control apparatus comprising at least one processor, and a memory coupled to the at least one processor, the memory having instructions that, when executed by the processor, perform operations as:
- an acquiring unit configured to acquire focus information from the optical apparatus;
- and
- a control unit configured to control, according to the focus information, movements of a first focus lens and an element that are independently movable in an optical axis direction,
- wherein the control unit performs first driving that moves the element so as to reduce an image-plane moving amount caused by a movement of the first focus lens in simultaneously moving the first focus lens and the element,
- wherein the control unit switches, based on one of an image-plane moving speed and an image-plane moving amount specified by the optical apparatus, between a first control mode in which a minimum image-plane moving speed is a first speed and a second control mode in which a minimum image-plane moving speed is a second speed lower than the first speed.
Dependencies are inferred from the claim text.