OPTICAL FILTER AND USE THEREOF

To provide: a thin optical filter having an excellent near-infrared ray shielding property and a low reflection characteristic by improving a weak point that a conventional optical filter, such as a near-infrared ray cut filter, has; and a device using the optical filter.SOLUTION: There is provided...

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Bibliographic Details
Main Authors OHASHI YUKIE, NAGAYA KATSUYA, KISHIDA HIROYUKI
Format Patent
LanguageEnglish
Japanese
Published 28.02.2019
Subjects
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PAINTS
PHYSICS
POLISHES
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Summary:To provide: a thin optical filter having an excellent near-infrared ray shielding property and a low reflection characteristic by improving a weak point that a conventional optical filter, such as a near-infrared ray cut filter, has; and a device using the optical filter.SOLUTION: There is provided an optical filter which comprises a base material satisfying a requirement (a) and an antireflection layer formed on at least one surface of the base material and which satisfies a specific optical characteristic. (a) A layer is included containing a chemical compound (A) having absorption maxima in a region with wavelength of 650 nm or more and less than 950 nm.SELECTED DRAWING: None 【課題】従来の近赤外線カットフィルター等の光学フィルターが有していた欠点を改良し、薄く、近赤外線遮蔽性に優れ、低い反射特性を有する光学フィルターおよび該光学フィルターを用いた装置を提供すること。【解決手段】要件（ａ）を満たす基材と、該基材の少なくとも一方の面に形成された反射防止層とを有し、かつ、特定の光学特性を満たすことを特徴とする光学フィルター：（ａ）波長６５０ｎｍ以上９５０ｎｍ未満の領域に吸収極大を有する化合物（Ａ）を含む層を有する。【選択図】なし
Bibliography:Application Number: JP20170151781