| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antireflective film exhibiting excellent transmittance characteristics in a wide incident angle range on a high refractive index glass, causing less flare, ghost or the like, and having an excellent tarnish preventing effect, to provide an optical component having the antireflective film, and to provide an interchangeable lens and an imaging device. <P>SOLUTION: The antireflective film comprises, from a substrate side, first to third layers sequentially deposited on the substrate, and is characterized in that: the substrate has a refractive index of 1.60 to 1.93 with respect to light in a wavelength region from 400 to 700 nm; the first layer essentially comprises alumina and has an optical film thickness of 97.0 to 181.0 nm; the second layer has a refractive index of 1.33 to 1.50 and an optical film thickness of 124.0 to 168.5 nm; and the third layer is a porous layer essentially comprising silica and has an optical film thickness of 112.5 to 169.5 nm. <P>COPYRIGHT: (C)2009,JPO&INPIT |
