| 摘要 |
PROBLEM TO BE SOLVED: To provide an imaging optical system barrier capable of substantially perfectly preventing the reflection of unwanted light on a surface, where an aperture part is formed, and to provide an imaging unit equipped therewith. SOLUTION: In the imaging optical system barrier 2, at least a part of the surface 4a or 5b, where the aperture part through which light is made to pass when it is at an opening position is formed has a anti-reflection structural body, where structural units having prescribed shape are cyclically arranged in an array state with a pitch smaller than the wavelength of the light that contributes to imaging. At least either the anti-reflection structural body itself or the part of an optical member, where the reflection preventing structural body is provided, comprises a material which can absorb the light that contributes to the imaging. COPYRIGHT: (C)2007,JPO&INPIT
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