Agc Inc.

Takuro Shimada

Kazuhiko Shiono

Takashi Nagata

Yuichiro Orita

Takahiro Sakagami

Nanako Nishimoto

Kiyokazu Endo

Katsushi Kamijyo

An optical filter including: a substrate; and a dielectric multilayer film laid on or above at least one major surface of the substrate as an outermost layer, in which the substrate includes a resin film including a dye (IR) and a resin, the dye (IR) has a maximum absorption wavelength in a wavelength of 680 to 800 nm in the resin, and the optical filter satisfies specific spectroscopic characteristics.

Optical filter

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).

Growing community of inventors

Fukushima, Japan

Takuro Shimada