Agc Inc.

Takashi Nagata

Kazuhiko Shiono

Yuichiro Orita

Takahiro Sakagami

Takuro Shimada

Hirofumi Yamamoto

Nanako Nishimoto

Kiyokazu Endo

Katsushi Kamijyo

Takeru Wakabayashi

An optical filter includes: a dielectric multilayer film; a substrate comprising a near-infrared ray absorbing glass and a resin film; and a dielectric multilayer filmin this order. The resin film comprises a near-infrared ray absorbing dye and a resin, the near-infrared ray absorbing glass is a fluorophosphate glass containing P, Cu, and F, and the optical filter satisfies all of the spectral characteristics (i-1) to (i-3), (i-5), and (i-13).

Optical filter

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 (I) having a maximum absorption wavelength in a wavelength of 690 to 900 nm in dichloromethane, and a resin, the optical filter transmits visible light and light in at least part of a wavelength of 900 to 1,000 nm, and the optical filter satisfies specific spectroscopic characteristics.

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.

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).

An optical filter, includes: a substrate, a dielectric multilayer filmlaid on or above one major surface of the substrate, and a dielectric multilayer filmlaid on or above the other major surface of the substrate, in which the substrate includes a near infrared ray absorbing glass and a resin film, the resin film includes a resin and a pigment (NIR1), and the optical filter satisfies all of spectral characteristics (i-1) to (i-3), (i-6) to (i-8), and (i-10) to (i-13).

An optical filter, includes: a substrate, a dielectric multilayer film 1 laid on or above one major surface of the substrate, and a dielectric multilayer film 2 laid on or above the other major surface of the substrate, in which the substrate includes a near infrared ray absorbing glass and a resin film, the resin film includes a resin and a pigment (NIR1), and the optical filter satisfies all of spectral characteristics (i-1) to (i-5), (i-7) to (i-10), (i-12) and (i-14).

There is provided a glass article using an ultraviolet absorbing glass substrate, the glass article suppressing solarization and exhibiting a high visible light transmittance. A glass article, comprising a glass substrate absorbing light at a wavelength of 250 to 400 nm from the surface and an antireflection film provided on at least one surface of the glass substrate, wherein the glass article has an ultraviolet irradiation degradation degree (X) of 1.5% or less, wherein the ultraviolet irradiation degradation degree (X) is T&#x2212;T, where Tis an average transmittance of light at the wavelength of 250 to 400 nm from a surface of the antireflection film in an initial state, and Tis an average transmittance of light at the wavelength of 250 to 400 nm from the surface of the antireflection film after irradiating the surface of the antireflection film with ultraviolet rays for one hour.

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Haibara-gun, Japan

Takashi Nagata