IMAGING APPARATUS

To provide an imaging apparatus that can achieve a precise autofocus function.SOLUTION: An imaging apparatus 1 comprises: an image sensor 11 in which two types of phase difference detection pixels different in opening state are arranged; a phase difference information reading unit 12 that reads out,...

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Bibliographic Details
Main Authors YAMASHITA TAKAYUKI, KIKUCHI YUKIHIRO, FUNATSU RYOHEI, TOMIOKA KOHEI, YASUE TOSHIO, NAKAMURA TOMOHIRO
Format Patent
LanguageEnglish
Japanese
Published 24.02.2023
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
ELECTROGRAPHY
HOLOGRAPHY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHOTOGRAPHY
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:To provide an imaging apparatus that can achieve a precise autofocus function.SOLUTION: An imaging apparatus 1 comprises: an image sensor 11 in which two types of phase difference detection pixels different in opening state are arranged; a phase difference information reading unit 12 that reads out, from the image sensor 11, pixel values of the phase difference detection pixels having the same opening state and creates two phase difference images; a phase difference detection unit 14 that detects a detection phase difference being the phase difference between the two phase difference images; a reference phase difference conversion unit 15 that, with a predetermined operational expression using the ratio between a lens parameter during imaging and a reference parameter being a lens parameter to be a standard, converts the detection phase difference into a reference phase difference when imaging is performed with the reference parameter; and a focus control unit 16 that controls focus with a preset focus drive amount corresponding to the reference phase difference.SELECTED DRAWING: Figure 1 【課題】正確なオートフォーカス機能を実現することが可能な撮像装置を提供する。【解決手段】撮像装置１は、開口状態が異なる２種類の位相差検出画素を配置したイメージセンサ１１と、イメージセンサ１１から、開口状態が同じ種類の位相差検出画素の画素値をそれぞれ読み出して、２つの位相差画像を生成する位相差情報読み出し部１２と、２つの位相差画像の位相差である検出位相差を検出する位相差検出部１４と、撮像時のレンズパラメータと基準となるレンズパラメータである参照パラメータとの比を用いた予め定めた演算式により、検出位相差を参照パラメータで撮像した場合の参照位相差に換算する参照位相差換算部１５と、参照位相差に対応する予め設定されたフォーカス駆動量でフォーカスを制御するフォーカス制御部１６と、を備える。【選択図】図１
Bibliography:Application Number: JP20210131075