Image pickup apparatus and image pickup
AssigneeCanon Kabushiki Kaisha
InventorTakaho Matsuda
Life of this patent
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Abstract
An image pickup apparatus which can perform focusing control with high speed and high precision is disclosed. The image pickup apparatus comprises a focus detection unit that detects a focusing state of the image-taking lens by phase difference detection method using light from the image-taking lens, and an in-focus judgment unit judges whether the image-taking lens is in an in-focus state or not, based on a result of a detection of contrast of an object image that has been taken with an image pickup device. Correction information, for correcting focusing control information of the image-taking lens that has been obtained by using the focus detection unit, is obtained based on information indicating the in-focus state of the lens obtained by using the in-focus judgment unit.
Claims13
An image pickup apparatus on which an image-taking lens can be mounted and removed, comprising:
- an image pickup device that receives an object image formed by the image-taking lens and photoelectrically converts the object image;
- a focus detection unit that detects a focusing state of the image-taking lens by phase difference detection method using light from the image-taking lens;
- an in-focus judgment unit electrically connected to the image pickup device, which judges whether the image-taking lens is in an in-focus state or not, based on a result of a detection of contrast of the object image that has been photoelectrically converted by the image pickup device;
- and
- a processing unit electrically connected to the focus detection unit and the in-focus judgment unit, which determines correction information for correcting focusing control information of the image-taking lens that has been obtained by using the focus detection unit, based on information indicating the in-focus state of the image-taking lens obtained by using the in-focus judgment unit.
An image pickup apparatus on which an image-taking lens can be mounted and removed, comprising:
- an image pickup device that receives an object image formed by the image-taking lens and photoelectrically converts the object image;
- a photometry unit that performs photometry by using ligit from the image-taking lens,
- a detecting device electrically connected to the image pickup device, which detects an exposure amount being received by the image pickup device,
- a processing unit electrically connected to the photometry unit and the detecting unit, which determines correction information for correcting exposure information obtained by using the photometry unit, based on information obtained by using the detecting unit.
Dependencies are inferred from the claim text.