INFRARED ABSORBING LAYER COMPOSITION, INFRARED CUT FILTER, AND IMAGE CAPTURING DEVICE

• Main Authors: KUBO YUICHIRO, SHINMO KATSUHIDE
• Format: Patent
• Language: English; Japanese
• Published: 27.07.2020
• Subjects: ADHESIVES; CHEMISTRY; DYES; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PAINTS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; POLISHES

To provide an infrared absorbing layer composition capable of reducing the degree to which transmittance for light near 400 nm becomes low among transmittances for light in the visible range.SOLUTION: An infrared absorbing layer composition of the present invention contains copper ions, a phosphonic acid compound, and at least either of phosphoric acid diester and phosphoric acid monoester, and has fine particles containing at least the above compound are dispersed therein. Phosphonic acid content with respect to a sum of phosphoric acid diester content and phosphoric acid monoester content is less than 2.5 times on a molar basis.SELECTED DRAWING: None 【課題】４００ｎｍ付近の光の透過率が可視光域の光に対する透過率の中で相対的に低くなる度合を軽減できる赤外線吸収層用組成物を提供する。【解決手段】本発明に係る赤外線吸収層用組成物は、銅イオンと、ホスホン酸化合物と、リン酸ジエステル及びリン酸モノエステルの少なくとも一方と、を含有している。また、少なくとも前記化合物を含む微粒子が分散している。ホスホン酸の含有量は、リン酸ジエステルの含有量とリン酸モノエステルの含有量との合計量に対してモル基準で２．５倍未満である。【選択図】なし