US 2011/0235188 A1Published application

Image pickup lens, image pickup apparatus, and lens controlling method

AssigneeCanon Kabushiki Kaisha

InventorYosuke Morimoto

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Abstract

An image pickup lens includes a controller and a manipulator position detector configured to detect a position of a manipulator configured to accept a manipulation used to move the lens. When the manipulation of the manipulator becomes valid and a difference between the position of the manipulator when the manipulation of the manipulator is invalid and the position of the manipulator when the manipulation of the manipulator is valid is equal or smaller than a threshold, the controller controls a movement of the lens from an initial position that is the position of the lens when the manipulation of the manipulator is invalid. When the manipulation of the manipulator becomes valid and the difference is larger than the threshold, the controller controls a movement of the lens from an initial position that is the position of the lens corresponding to the manipulator's position detected by the manipulator position detector.

Claims9

Dependent claims

An image pickup lens comprising:

an optical system including a lens;
a controller configured to control a movement of the lens in an optical axis direction;
a lens position detector configured to detect a position of the lens;
a manipulator configured to accept a manipulation used to move the lens;
and
a manipulator position detector configured to detect a position of the manipulator,
wherein when power becomes turned on or the manipulation of the manipulator becomes valid and when a difference between the position of the manipulator when the power is turned off or the manipulation of the manipulator is invalid and the position of the manipulator when the power becomes turned on or the manipulation of the manipulator becomes valid is equal to or smaller than a threshold, the controller is configured to control the movement of the lens from an initial position that is the position of the lens detected by the lens position detector when the power is turned off or the manipulation of the manipulator is invalid, and when power becomes turned on or the manipulation of the manipulator becomes valid and when the difference is larger than the threshold, the controller is configured to control the movement of the lens from an initial position that is the position of the lens which corresponds to the position of the manipulator detected by the manipulator position detector.

4 more elements

An image pickup apparatus comprising:

a lens position detector configured to detect a position of a lens;
a manipulator position detector configured to detect a position of a manipulator configured to accept a manipulation used to move the lens;
a memory configured to store the position of the manipulator detected by the manipulator position detector and the position of the lens detected by the lens position detector when power is turned off or the manipulation of the manipulator is invalid;
and
a controller, wherein when power becomes turned on or the manipulation of the manipulator becomes valid and when a difference between the position of the manipulator when the power is turned off or the manipulation of the manipulator is invalid and the position of the manipulator when the power becomes turned on or the manipulation of the manipulator becomes valid is equal to or smaller than a threshold, the controller is configured to control the movement of the lens from an initial position that is the position of the lens when the power is turned off or the manipulation of the manipulator is invalid, and when power becomes turned on or the manipulation of the manipulator becomes valid and when the difference is larger than the threshold, the controller is configured to control the movement of the lens from an initial position that is the position of the lens which corresponds to the position of the manipulator detected by the manipulator position detector.

2 more elements

Dependencies are inferred from the claim text.