| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect an artifact on an image by simple operation and conjectures the cause of each artifact. <P>SOLUTION: By a usual imaging method, the dust check image 1 of the test pattern of a model eye performs normal record as shown in (a). After that, an imaging lens is moved to a location, which is different from a standard position, for example, a location of visibility +10 D (diopter) and photographing of the test pattern is performed again to acquire a dust check image 2 of (b). By performing comparison of these dust check images 1 and 2, it is possible to know the influence of the transfer of a focus on the artifact and it is possible to distinguish whether for example, there is the cause of the artifact in the imaging surface or in the surfaces of the lens and a mirror, etc. <P>COPYRIGHT: (C)2007,JPO&INPIT |
