| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase the flexibility of optical characteristics of an optical filter, using a metal thin film, and to enhance the transmittance thereof. Ž<P>SOLUTION: An optical filter includes a light-shielding conductive layer, provided with a plurality of apertures on a substrate surface that selectively transmits light of a first wavelength and a dielectric layer in contact with the conductive layer. The size of the apertures is a size equal to or less than the first wavelength, and the ratio of the surface area of the conductive layer to the surface area of the substrate surface is within a range of 36% or more to 74% or less. A transmissivity of the first wavelength is increased by surface plasmons induced in the apertures by light falling on the conductive layer. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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