Agc Inc.

Kiyokazu Endo

Kazuhiko Shiono

Takahiro Sakagami

Takashi Nagata

Yuichiro Orita

Takuro Shimada

Katsushi Kamijyo

An optical filter includes a first dielectric multilayer film, a resin film, a phosphate glass, and a second dielectric multilayer film. The second dielectric multilayer film includes at least one Hlayer satisfying a refractive index of 1.8 or more and 2.5 or less and a QWOT of 1.1 or more and 3.5 or less, when a layer closest to the phosphate glass in the Hlayers is defined as a first Hlayer, the second dielectric multilayer film comprises a first Mlayer comprising a single layer satisfying a QWOT of 1.2 or more and 1.8 or less or a plurality of layers satisfying a total QWOT of 1.2 or more and 1.8 or less between the first Hlayer and the phosphate glass, and the optical filter satisfies all of the spectral characteristics (i-1) to (i-4).

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Fukushima, Japan

Kiyokazu Endo