| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a high-precision focus detection optical system capable of covering a wide focus detection region even when the size of the focus detection optical system is reduced further, and an imaging apparatus equipped with it. <P>SOLUTION: In the focus detection optical system in which the center of gravity F-numbers of the exit pupil formed by an aperture diaphragm S are all the same, and which detects focus by detecting an amount of the relative displacement of two secondary object images which are paired with each other, the first focus detection region A1 and the second focus detection region A2 for detecting a phase difference in the first direction X are shorter than the third focus detection region A3 or the fourth focus detection region A4 for detecting a phase difference in the second direction Y in the first direction X. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
