焦点検出装置および方法、および撮像装置

Japanese Patent JP7022575

B2

PROBLEM TO BE SOLVED: To suppress influence for magnification aberration of an image formation optical system to give to a focus detection result, and to perform accurate focus detection in an imaging device performing automatic focus detection by means of a phase difference detection method on the basis of a signal obtained from a plurality of focus detection pixels having different spectral sensitivities to each other.SOLUTION: A focus detection device that comprises a plurality of photo-electric conversion units for each of a plurality of microlenses, that performs photo-electric conversion of injected light through an image formation optical system to output an electric signal, and that performs focus detection by means of a phase difference detection method on the basis of a signal having a plurality of colors obtained from an imaging element covered by a color filter having a plurality of colors comprises: acquisition means that acquires an addition coefficient set indicating weighting applied to the signal having the plurality of colors, according to a characteristic of chromatic aberration of magnification of the image formation optical system; generation means that generates a pair of focus detection signals by performing weighting addition of the signal having the plurality of colors using the addition coefficient set; and detection means that detects an image deviation amount between the pair of focus detection signals.SELECTED DRAWING: Figure 1

Nobutaka Mizuno

JP2017236295A

February 18, 2022

December 08, 2017

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Canon Inc

G02B7/34; G03B13/36; H04N5/232; H04N9/07

JP2014215436A
JP2014072541A
JP2016180999A
JP2014222291A
JP2008052009A
JP2013171251A

WO2016111175A1

Patent Business Corporation Otsuka International Patent Office

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