| 摘要 |
<P>PROBLEM TO BE SOLVED: To form an erect unmagnified image of an object with high quality, by effectively preventing entry of dust into an open hole of a shading component included in an imaging optical element. <P>SOLUTION: An imaging optical element comprises: an imaging optical system 51 for forming an erect unmagnified image of a manuscript (object) OB through arranging lens arrays 51a, 51b having lenses 512 in layers; a shading component 52 having an open hole 52a for passing light reflected at the manuscript OB, and arranged at an object (manuscript) side of the imaging optical system 51 such that the light passing through the open hole 52a enters a lens 512 positioned in the lens array 51a of the imaging optical system 51 arranged at a position closest to the manuscript OB; and a transparent flat plate 55 made of a translucent material, arranged at an object side of the shading component 52 and covering the open hole 52a. <P>COPYRIGHT: (C)2013,JPO&INPIT |
