| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To achieve an effective image recovering process by providing an optical device that has characteristics matched with the image recovering process, an imaging apparatus and imaging system that use the optical device. <P>SOLUTION: The optical device in which an image of a subject is formed on an imaging element and the image recovering process is carried out for the image obtained on the imaging element, includes an MTF that satisfies conditional expressions (1): 0.001<L×NA<0.5 and 5<a<30, wherein L is an MTF width when the MTF is a% and NA is the numerical aperture of the optical device. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
