FILTER ATTACHMENT AND PHOTOGRAPHING DEVICE HAVING THE FILTER ATTACHMENT

摘要

PROBLEM TO BE SOLVED: To provide a filter attachment capable of yielding excellent image quality by excellently correcting chromatic aberration without in a medium having a larger refractive index than air such as underwater making an entire camera larger nor causing drastic cost rise.;SOLUTION: A photographing device 40 is constituted of a housing 51 inside which a camera 60 is hermetically sealed/housed, and a camera housing 50 positioned on the optical axis of a photographic lens PL of the camera 60 and having an optical window WL provided on the housing 51. In the case of putting the device 40 in the medium having a refractive index larger than the air and photographing an outside object by the camera 60, the aberration is corrected by attaching the filter attachment FA where a diffraction optical surface Gf is formed to the photographic lens PL.;COPYRIGHT: (C)2004,JPO&NCIPI