Imaging apparatus
AssigneeCanon Kabushiki Kaisha
InventorHiroto Okawara
Life of this patent
Estimating the term…
Abstract
A lens-controlling device controls a first lens unit which moves for zooming and a second lens unit which moves for correcting the displacement of an image plane caused by zooming and for focusing. The lens-controlling device includes a memory which stores data for obtaining target-position information representing a target position to which the second lens unit is to be moved, the target position corresponding to a position to which the first lens unit is moved from a current position and a controller which generates the target-position information on the basis of the data and controls the movement of the second lens unit on the basis of position information of the first lens unit and the target-position information.
Claims10
A lens-controlling device for controlling a first lens unit which moves for zooming and a second lens unit which moves for focusing, the lens-controlling device comprising:
- a first AF unit which detects a position of the second lens unit focusing on an object on the basis of a high-frequency component of the object image;
- a second AF unit which detects a position of the second lens unit focusing on the object using different scheme from the first AF unit;
- a memory which stores data for obtaining target-position information representing a target position to which the second lens unit is to be moved, the target position corresponding to a position to which the first lens unit is moved from a current position;
- and
- a controller which generates the target-position information on the basis of the data stored in the memory and controls the movement of the second lens unit on the basis of position information of the first lens unit and the target-position information,
- wherein the controller selects data items to be used from the data stored in the memory on the basis of a detection result obtained by the second AF unit.
A method for controlling a first lens unit which moves for zooming and a second lens unit which moves for focusing, the method comprising the steps of:
- firstly detecting a position of the second lens unit focusing on an object on the basis of a high-frequency component of the object image
- secondly detecting a position of the second lens unit focusing on the object using different scheme from the first AF unit;
- storing data for obtaining target-position information representing a target position to which the second lens unit is to be moved in a memory, the target position corresponding to a position to which the first lens unit is moved from a current position;
- generating the target-position information on the basis of the data stored in the memory;
- and
- controlling the movement of the second lens unit on the basis of position information of the first lens unit and the target-position information,
- wherein, data items to be used in the step of generating the target-position information are selected from the data stored in the memory on the basis of a detection result obtained by the step of secondly detecting.
Dependencies are inferred from the claim text.