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    • 14. 发明授权
    • Infrared filter
    • 红外线过滤器
    • US06879438B2
    • 2005-04-12
    • US10101794
    • 2002-03-20
    • Narihiro Masuda
    • Narihiro Masuda
    • G02B5/22B29C47/06B29C55/12B32B27/18B32B27/36G02B5/20
    • G02B5/208B32B27/36
    • The present invention relates to an infrared filter comprising a biaxially oriented co-extruded film having at least three polyester layers comprising an intermediate polyester layer and the surface polyester layers on both sides of the said intermediate layer,said intermediate layer containing a near infrared absorber having an absorption peak at 800 to 1,100 nm in an amount of 0.1 to 10% by weight based on the weight of the intermediate layer,the light transmittance of said film being not higher than 30% at 950 nm, andthe average center line roughness (Ra) of the film surface on at least one side being 10 to 30 nm.
    • 本发明涉及一种红外线过滤器,其包括具有至少三个聚酯层的双轴取向共挤出膜,所述聚酯层包含中间聚酯层和位于所述中间层两侧的表面聚酯层,所述中间层含有近红外吸收体, 基于中间层的重量,在800至1100nm的吸收峰为0.1至10重量%,所述膜的透光率在950nm处不高于30%,平均中心线粗糙度(Ra )在至少一侧的膜表面为10〜30nm。