Focus detection device and image-capturing apparatus
AssigneeNikon Corporation
InventorYosuke KUSAKA
Life of this patent
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Abstract
A focus detection device includes: an image sensor that includes a plurality of focus detection pixel rows, each having a plurality of focus detection pixels and each outputting a pair of focus detection signals; a spatial accumulation unit that calculates spatially accumulated values by adding together pairs of focus detection signals output from a first predetermined number of focus detection pixel rows among the plurality of focus detection pixel rows; and a focus detection unit that detects a focusing condition at an optical system based upon the spatially accumulated values.
Claims17
A focus detection device, comprising:
- an image sensor that includes a plurality of pixels that output signals upon receiving light passing through an optical system;
- and
- a processor that adds together signals output from the plurality of pixels, and that detects a deviation amount of a position of an image formed by the optical system from the image sensor based on a signal obtained by addition at the processor, wherein:
- the processor adds together the signals output from the plurality of pixels until a value of the signal obtained by addition has reached a predetermined value or more or until a number of pixels used for the addition has reached a predetermined number.
A focus detection device, comprising:
- an image sensor that includes a plurality of pixels that output signals upon receiving light passing through an optical system;
- a memory that stores first signals output from the plurality of pixels;
- and
- a processor that adds together the first signals stored in the memory and a second signal obtained by adding together the signals output from the plurality of pixels, and that detects a deviation amount of a position of an image formed by the optical system from the image sensor based on a signal obtained by addition at the processor.
Dependencies are inferred from the claim text.