Agc Inc.

Asahi Glass Company, Limited

Kazuhiko Shiono

Hiroki Hotaka

Keigo Matsuura

Takashi Nagata

Shoko Suzuki

Sayuri Yamada

Hiroyuki Arishima

Asana Yoshioka

Yoshiharu Ooi

Hiroshi Kumai

Takahiro Sakagami

Teppei Konishi

Nanako Nishimoto

Yuichiro Orita

Satoshi Okada

Motoshi Nakayama

Sayuri Higashitamori

Takuro Shimada

Makoto Hasegawa

Hiroshi Shimoda

Aya Ito

Ryo Hirano

Hiromichi Nagayama

Atsushi Komori

Aya Ikoma

Tatsuo Yokote

Takeru Wakabayashi

Kiyokazu Endo

Katsushi Kamijyo

An optical filter, including a first absorption layer containing a near-infrared absorbing dye and a transparent resin. The optical filter also includes a reflection layer. The first absorption layer has a thickness of 0.3 μm to 10 μm. The optical filter satisfies conditions described in the disclosure. An imaging apparatus including the optical filter.

Optical filter and imaging device

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.

Optical filter

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).

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).

A near-infrared cut filter glass has: an average transmittance in a wavelength range of 400-550 nm of 50-92%; a transmittance at a wavelength of 700 nm of 40-92%; an average transmittance in a wavelength range of 850-950 nm of 0.0001-70%; and an average transmittance in a wavelength range of 1200-2500 nm of 0.0001-60%.

Near-infrared cut filter glass and optical filter

The present invention relates to an optical filter including a resin base material including an infrared-absorbing pigment layer, and a pair of inorganic dielectric layers which are respectively disposed on or above both main surfaces of the resin base material as outermost layers, in which at least one of the pair of inorganic dielectric layers satisfies at least one of a condition in which a film thickness is 4 μm or greater, and a condition in which the number of layers is 30 or greater, and a ratio of a total film thickness of the pair of inorganic dielectric layers to a film thickness of the resin base material is greater than 8%.

An optical filter includes: an absorption layer including a first near-infrared absorbing dye (D1), a second near-infrared absorbing dye (D2), and a transparent resin; and a reflection layer including a dielectric multilayer film. The dye (D1) and the dye (D2) are squarylium compounds satisfying following (1) to (3). (1) The dye (D1) has a maximum absorption wavelength λwithin a range of 680 to 730 nm, and the difference between a wavelength at which a transmittance is 80% on the shorter wavelength side than λwhen the concentration is adjusted such that a transmittance at λis 10%, and λis 100 nm or less. (2) The dye (D2) has a maximum absorption wavelength λwithin a range of 720 to 770 nm. (3) A value obtained by subtracting λfrom λis 30 nm or more and 85 nm or less.

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 resin substrate having a thickness of 20 μm or more and 110 μm or less; an absorption layer having a thickness of 0.25 μm or more and 12 μm or less and being disposed on at least one principal surface of the resin substrate; and dielectric multilayer films disposed as an outermost layer on both principal surfaces of the resin substrate. At least one of the dielectric multilayer films is a near-infrared reflection layer. The resin substrate includes a first transparent resin having a glass transition temperature of 170° C. or more and having specific optical properties. The absorption layer includes a near-infrared absorbing dye (A) and a second transparent resin having a glass transition temperature of 170° C. or more, and the near-infrared absorbing dye (A) satisfies specific optical properties in relation to the second transparent resin.

The present invention relates to an optical filter containing: an absorption layer containing a near-infrared absorbing dye (A) having a maximum absorption wavelength in dichloromethane being in a wavelength range of 850 to 1,100 nm and a transparent resin; and a reflection layer formed of a dielectric multilayer film, in which the near-infrared absorbing dye (A) satisfies the following Formulae (1) to (4).ABS/ABS<0.10  (1),ABS/ABS<0.04  (2),ABS/ABS<0.15  (3), andABS/ABS<0.10  (4).

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).

The present invention relates to an optical filter containing: an absorption layer containing a near-infrared absorbing dye satisfying the following (i-1) to (i-5), and a transparent resin; and a reflection layer, and satisfying the following (ii-1);

An optical filter includes: an absorption layer including a first near-infrared absorbing dye (D1), a second near-infrared absorbing dye (D2), and a transparent resin; and a reflection layer including a dielectric multilayer film. The dye (D1) and the dye (D2) are squarylium compounds satisfying following (1) to (3). (1) The dye (D1) has a maximum absorption wavelength &#x3bb;within a range of 680 to 730 nm, and the difference between a wavelength at which a transmittance is 80% on the shorter wavelength side than &#x3bb;when the concentration is adjusted such that a transmittance at &#x3bb;is 10%, and &#x3bb;is 100 nm or less. (2) The dye (D2) has a maximum absorption wavelength &#x3bb;within a range of 720 to 770 nm. (3) A value obtained by subtracting &#x3bb;from &#x3bb;is 30 nm or more and 85 nm or less.

An optical filter includes an absorption layer which increases a visible light transmittance while having a good near-infrared blocking characteristic, and which is excellent in not only adhesiveness with respect to a layer to be abutted, but also light resistance. The optical filter includes: an absorption layer containing a near-infrared absorbing dye containing a squarylium-based dye and a transparent resin; and an inorganic or organic material in contact with the absorption layer. The squarylium-based dye has a squarylium skeleton and condensed ring structures bonded thereto respectively on both sides thereof, the condensed ring structures each including a benzene ring and a nitrogen atom as an annular atom, each benzene ring having an urethane structure in the second position.

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Koriyama, Japan

Kazuhiko Shiono