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    • 10. 发明申请
    • NEAR-INFRARED CUT FILTER
    • 近红外切割过滤器
    • US20150260889A1
    • 2015-09-17
    • US14729275
    • 2015-06-03
    • ASAHI GLASS COMPANY, LIMITED
    • Kazuhiko ShionoHiroyuki ArishimaTeppei KonishiHiroki Hotaka
    • G02B5/28G02B1/04
    • G02B5/282C08K5/3417C09B57/007C09B67/0034G02B1/04G02B5/208G02B5/223C08L2666/70
    • There is provided a near-infrared cut filter which has a visible light transmitting property and a near-infrared shielding property both at high levels by that its transmission spectrum has a steep inclination in the vicinity of the boundary between the visible light and the near-infrared, and which can also be sufficiently reduced in size and thickness. The near-infrared cut filter has a near-infrared absorbing layer which contains a near-infrared absorbing dye containing at least one dye in which a condensed ring structure containing at least a benzene ring and a ring having nitrogen atom is bonded to both sides of a squarylium skeleton and which have a carboxylic acid amide structure at a second position of the benzene ring (where the carboxylic acid has a substituent having 5 to 25 having one or more branches), and a transparent resin with a refractive index of 1.45 or more.
    • 提供了一种近红外截止滤光器,其具有高可见光透过性和近红外屏蔽性,因为其透射光谱在可见光和近紫外线之间的边界附近具有陡峭的倾角, 红外线,并且其尺寸和厚度也可以充分降低。 近红外线截止滤光器具有近红外线吸收层,其包含含有至少一种染料的近红外吸收染料,其中至少含有苯环的稠环结构和具有氮原子的环与两个 方酸骨架,并且在苯环的第二位置(其中羧酸具有一个或多个分支的具有5〜25个的取代基)具有羧酸酰胺结构,折射率为1.45以上的透明树脂 。