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US 10,855,905 B2Granted
Focus adjustment device and imaging apparatus
AssigneeNikon Corporation
InventorsHiroaki Takahara, Hiroyuki Tomita
Life of this patent
Estimating the term…
Abstract
A focus adjustment device comprising: a first detector which detects a focused state by a contrast detection system; second detectors which detect a focused state by a phase difference detection system; and a control unit which controls the first detector and second detectors so as to detect the focused state by the second detectors when detecting the focused state by the first detector.
Claims12
An imaging apparatus comprising:
- an imaging unit which captures an image formed by an optical system which has a focus lens and outputs a signal based on the capturing;
- and
- a control unit that
- calculates, based on the signal outputted from part of an area on the imaging unit, an amount related to deviation between the image formed by the optical system and an imaging plane of the imaging unit and a focus evaluation value related to a contrast, and
- controls a movement of the focus lens based on the amount related to the deviation when the amount related to the deviation can be calculated, wherein
- the control unit does not move the focus lens based on the amount related to the deviation even if the amount related to the deviation can be calculated while moving the focus lens to a position based on the focus evaluation value.
3 more elements
Dependencies are inferred from the claim text.