| 摘要 |
The purpose of the present invention is to provide a focus control device capable of achieving both improved accuracy and lower power consumption during focus control when imaging a moving picture, a lens device and an imaging device equipped with the focus control device, and a focus control method and program. The focus control device comprises: a first imaging element (20) for outputting a pair of image signals deviated in one direction relative to one subject image; optical elements (a beam splitter (16), mirror (17), collecting lens (18), and a separator lens (19)) for introducing, onto a second imaging element (31) for imaging the subject image through an imaging optical system including a focus lens (11), a part of the subject light incident onto the imaging optical system and introducing the rest of the subject light onto the first imaging element (20); and a controller (26) for controlling the focusing of the focus lens (11) on the basis of the phase difference between the pair of image signals output from the first imaging element (20), and controlling the read out rate of the image signal from the first imaging element (20). |
