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;
- 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, wherein
- the controller controls driving of the driver such that a speed of the optical member is equal to the target speed,
- when the difference between the position and the target position is equal to or smaller than a first threshold and larger than a second threshold, the target speed derived by the speed deriver becomes lower as the difference becomes smaller, and
- when the difference is equal to or smaller than the second threshold, the target speed is a value with which to maintain the position of the optical member.
An image pickup apparatus comprising:
- a lens apparatus comprising:
- 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, wherein
- the controller controls driving of the driver such that a speed of the optical member is equal to the target speed,
- when the difference between the position and the target position is equal to or smaller than a first threshold and larger than a second threshold, the target speed derived by the speed deriver becomes lower as the difference becomes smaller, and
- when the difference is equal to or smaller than the second threshold, the target speed is a value with which to maintain the position of the optical member;
- and
- a camera apparatus including an image pickup element that receives light of a subject image formed by the lens apparatus.
Dependencies are inferred from the claim text.