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US 6,849,327 B1Granted
Optical filter
AssigneeFuji Photo Film Co., Ltd.
InventorsIsao Ikuhara, Tsukasa Yamada, Takumi Ando
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AssigneeFuji Photo Film Co., Ltd.
InventorsIsao Ikuhara, Tsukasa Yamada, Takumi Ando
Estimating the term…
An optical filter comprising a filter layer absorbing visible light, a transparent support, in particular a transparent support comprising a biaxially stretched film, and an antireflection layer, with which an image display such as a plasma display is equipped for preventing reflection and improving color reproduction. An optical filter comprising a transparent support having provided at least on one side of the support a filter layer containing a dye and a polymer binder, wherein an antireflection layer having an antireflection property to visible light is provided on the side opposite to the side on which the filter layer is provided when the filter layer is provided on either one side, and the antireflection layer is provided on either one side when the filter layers are provided on both sides, and the transparent support comprises a biaxially stretched film having a thickness of from 10 to 500 μm.
An optical filter comprising a transparent support having provided at least on one side of the support a filter layer containing a dye and a polymer binder, wherein an antireflection layer having an antireflection property to visible light is provided on the side opposite to the side on which the filter layer is provided when the filter layer is provided on either one side, and the antireflection layer is provided on either one side when the filter layers are provided on both sides, and said transparent support comprises a biaxially stretched film having a thickness of from 10 to 500 μm, wherein said filter layer has absorption maximums in both of from 560 to 620 nm and from 500 to 550 nm.
An optical filter comprising a transparent support having provided at least on one side of the support a filter layer containing a dye and a polymer binder, wherein an antireflection layer having an antireflection property to visible light is provided on the side opposite to the side on which the filter layer is provided when the filter layer is provided on either one side, and the antireflection layer is provided on either one side when the filter layers are provided on both sides, and said transparent support comprises a biaxially stretched film having a thickness of from 10 to 500 μm, wherein at least one side of said transparent support comprising a biaxially stretched film is provided with an undercoat layer comprising a polymer having a glass transition temperature of from −20° C. to 60° C.
An optical filter comprising a transparent support and a filter layer which comprises a dye and a binder, wherein said filter layer has an absorption maximum in the range of from 560 to 620 nm, and the weight ratio of said dye to said binder is from 1:50 to 1:2000, wherein the binder contained in the filter layer is gelatin.
Dependencies are inferred from the claim text.