Focus adjustment device, method for controlling the same, and image capture apparatus
AssigneeCanon Kabushiki Kaisha
InventorsYumi Watanabe, Hideyuki Hamano
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Abstract
A focus adjustment device obtains a correction value for correcting a result of autofocus, from aberration information regarding at least one of an astigmatism, a chromatic aberration, and a spherical aberration of an imaging optical system, and focus detection information regarding the autofocus. The focus adjustment device then controls a position of a focusing lens that the imaging optical system has, based on a result of the autofocus corrected using the correction value. By correcting the result of the autofocus while considering at least a focus condition of a photographic image, a focus detection error caused by an aberration of the optical system can be accurately corrected.
Claims23
A focus adjustment device capable of executing autofocus by at least one of a phase-difference detection method and a contrast detection method, the device comprising:
- an obtaining unit configured to obtain a correction value for correcting a result of the autofocus, from aberration information regarding at least one of an astigmatism, a chromatic aberration, and a spherical aberration of an imaging optical system, and focus detection information regarding the autofocus;
- and
- a control unit configured to control a position of a focusing lens that the imaging optical system has, based on the result of the autofocus corrected using the correction value.
A method for controlling a focus adjustment device capable of executing autofocus by at least one of a phase-difference detection method and a contrast detection method, the method comprising:
- an obtaining step of obtaining a correction value for correcting a result of the autofocus, from aberration information regarding at least one of an astigmatism, a chromatic aberration, and a spherical aberration of an imaging optical system, and focus detection information regarding the autofocus;
- and
- a control step of controlling a position of a focusing lens that the imaging optical system has, based on the result of the autofocus corrected using the correction value.
Dependencies are inferred from the claim text.