NEAR-INFRARED CUT FILTER AND SOLID-STATE IMAGING APPARATUS

PROBLEM TO BE SOLVED: To provide a near-infrared cut filter that effectively uses near-infrared absorbing glass and a near-infrared absorbing dye and is excellent in a near-infrared shielding property, and a high-sensitivity solid-state imaging apparatus comprising the same.SOLUTION: The near-infrar...

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Main Authors HASEGAWA MAKOTO, KOMORI ATSUSHI, ARISHIMA HIROYUKI, SHIONO KAZUHIKO, IKOMA AYA, SHIMODA HIROSHI, HODAKA HIROKI, KONISHI TEPPEI
Format Patent
LanguageEnglish
Japanese
Published 01.02.2018
Subjects
ADHESIVES
CHEMISTRY
DYES
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LAKES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
POLISHES
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Summary:PROBLEM TO BE SOLVED: To provide a near-infrared cut filter that effectively uses near-infrared absorbing glass and a near-infrared absorbing dye and is excellent in a near-infrared shielding property, and a high-sensitivity solid-state imaging apparatus comprising the same.SOLUTION: The near-infrared cut filter has: a near-infrared absorbing glass substrate made of CuO-containing fluorophosphate glass ; and a near-infrared absorbing layer containing a near-infrared absorbing dye (A) and a transparent resin (B), on at least one principal surface of the near-infrared absorbing glass substrate, The near-infrared absorbing glass substrate has an average transmittance of 18% or more in the wavelength region of 650 to 720 nm, the near-infrared ray absorbing layer has a transmittance of 80% or more in the wavelength region of 450 to 550 nm, an average value of transmittance of 80% or more in the wavelength region of 400 to 550 nm and an average value of transmittance of 15% or less of in the wavelength region of 650 to 720 nm.SELECTED DRAWING: Figure 1 【課題】近赤外線吸収ガラスと近赤外線吸収色素を効果的に用いた、近赤外線遮蔽特性に優れる近赤外線カットフィルタおよびこれを備えた高感度な固体撮像装置を提供する。【解決手段】ＣｕＯ含有フツリン酸塩ガラスからなる近赤外線吸収ガラス基材と、該近赤外線吸収ガラス基材の少なくとも一方の主面上に近赤外線吸収色素（Ａ）および透明樹脂（Ｂ）を含有する近赤外線吸収層と、を有し、前記近赤外線吸収ガラス基材は、６５０〜７２０ｎｍの波長域における平均透過率が１８％以上であり、前記近赤外線吸収層は、４５０〜５５０ｎｍの波長域における透過率が８０％以上であり、４００〜５５０ｎｍの波長域における透過率の平均値が８０％以上であり、かつ６５０〜７２０ｎｍの波長域における透過率の平均値が１５％以下であることを特徴とする近赤外線カットフィルタ。【選択図】図１
Bibliography:Application Number: JP20170200169