| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus that does not decrease the number of recording pixels of a final image while achieving a short focusing time. <P>SOLUTION: An imaging apparatus with an imaging optical system that is detachable or fixed includes; a pupil division optical system that is configured to divide an exit pupil of the imaging optical system into different areas; and an image pickup device in which pixels are arranged two-dimensionally. The pupil division optical system is disposed in the vicinity of an object side of the image pickup device. The imaging optical system and pupil division optical system image an object point on the image pickup device as an image point. The imaging apparatus further includes: moving means for moving the image point; pixel signal acquisition means for acquiring pixel signals of the pixels each time when the image point is moved by the moving means; calculation means for calculating a defocus amount based on the pixel signals acquired each time when the image point is moved; and image construction means for constructing image data based on the pixel signals. <P>COPYRIGHT: (C)2012,JPO&INPIT |
