| 摘要 |
PROBLEM TO BE SOLVED: To provide a focus detecting device capable of reducing an influence of image blur on arithmetic calculation of a focused lens position. SOLUTION: The focus detecting device includes: an imaging device 2 for picking up a subject image; a filter circuit 9, an integration circuit 10 and an AF circuit 11 for calculating a focus evaluated value for each of a plurality of focus lens positions of a photographing optical system 1 by extracting a frequency component in a prescribed frequency range from the imaging data of the imaging device 2; an image blur amount detection part 17 for detecting an image blur amount on an imaging surface of the subject image when acquiring the imaging data; and the AF circuit 11 for correcting the focus evaluated value on the basis of the image blur amount. The AF circuit 11 calculates the focused lens position of the photographing optical system on the basis of a plurality of corrected focus evaluated values. COPYRIGHT: (C)2008,JPO&INPIT |
