Lens apparatus and image pickup apparatus including the same
AssigneeCanon Kabushiki Kaisha
InventorKazuto Suzuki
Life of this patent
Estimating the term…
Abstract
A lens apparatus includes: an optical member; a driver that drives the optical member; a position detector that detects a position of the optical member; a target position deriver that sets a target position to which to drive the optical member; a speed deriver that derives a target speed for the driver to drive the optical member based on a difference between the target position and the position of the optical member; and a controller that controls the driver. The controller controls driving of the driver such that a speed of the optical member is equal to the target speed.
Claims7
A lens apparatus comprising:
- an optical member;
- an actuator configured to move the optical member;
- a position detector configured to detect a position of the optical member;
- and
- a processor configured to:
- set a target position to which to move the optical member;
- obtain a target speed of the optical member based on a difference between the target position and the position of the optical member;
- and
- control the-actuator based on the target speed,
- wherein,
- in a case where the difference is not larger than a first threshold and larger than a second threshold, the processor is configured to obtain an output value for the actuator based on a difference between the target speed and a speed of the optical member, and
- in a case where the difference is not larger than the second threshold, the processor is configured to obtain the output value for the actuator with which the position of the optical member is not changed.
An image pickup apparatus comprising:
- a lens apparatus including:
- an optical member;
- an actuator configured to move the optical member;
- a position detector configured to detect a position of the optical member;
- and
- a processor configured to:
- set a target position to which to move the optical member;
- obtain a target speed of the optical member based on a difference between the target position and the position of the optical member;
- and
- control the actuator,
- wherein,
- in a case where the difference is not larger than a first threshold and larger than a second threshold, the processor is configured to obtain an output value for the actuator based on a difference between the target speed and a speed of the optical member, and
- in a case where the difference is not larger than the second threshold, the processor is configured to obtain the output value for the actuator with which the position of the optical member is not changed;
- and
- an image pickup element configured to receive light of an image formed by the lens apparatus.
Dependencies are inferred from the claim text.