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    • 33. 发明授权
    • Light-sensitive silver halide photographic film material and radiographic intensifying screen-film combination
    • 感光卤化银照相胶片材料和放射照相增强屏幕膜组合
    • US06472137B1
    • 2002-10-29
    • US09709628
    • 2000-11-13
    • Ann VerbeeckPaul CallantFreddy Henderickx
    • Ann VerbeeckPaul CallantFreddy Henderickx
    • G03C1005
    • G03C5/16G03C1/0051G03C1/122G03C1/29Y10S430/167
    • A light-sensitive silver halide photographic film material has been provided, said film material comprising a transparent support and on both sides thereof at least one light-sensitive emulsion layer having spectrally and chemically sensitized tabular silver halide grains rich in silver bromide, further having silver iodide in an amount of less than 3 mole % based on silver, with two flat parallel {111} crystal faces, said grains accounting for a total projective surface of said parallel crystal faces in said emulsion of at least 50%, further having an average aspect ratio of at least 2:1, a grain thickness of from 0.05 up to 0.15 &mgr;m, a site-directing azacyanine compound satisfying the general formulae disclosed herein in an amount of not less than 1×10−4 mole per mole of silver halide coated and one or more J-aggregating spectrally sensitizing dye(s), wherein a molar ratio amount between said site directing compound and said J-aggregating spectrally sensitizing dye(s) is at least 1:6 for a grain coverage of said {111} tabular grains exceeding 50%. A radiographic screen/film combination has also been described comprising said light-sensitive silver halide photographic film material and two supporting or self-supporting X-ray intensifying screens) comprising luminescent phosphors, wherein by contacting the film material with a sandwich of a pair of said intensifying screens and exposing said combination to X-rays, emission of radiation by said luminescent phosphors in the wavelength range for which said material has been made spectrally sensitive provides a black-and-white diagnostic image after processing of said exposed radiographic film material.
    • 已经提供了感光卤化银照相胶片材料,所述胶片材料包括透明支撑体,并且在其两侧上具有至少一个感光乳剂层,其具有富含溴化银的光谱和化学增感的片状卤化银颗粒,还具有银 碘化物的量小于3摩尔%,具有两个平的平行{111}晶面,所述颗粒占所述乳液中所述平行晶面的总投影面至少为50%,进一步具有平均 纵横比为至少2:1,晶粒厚度为0.05至0.15μm,位置引导的氮杂菁化合物,其满足本文公开的通式,其用量为每摩尔卤化银涂层不小于1×10 -4摩尔, 一种或多种J聚集光谱增感染料,其中所述位点引导化合物和所述J-聚集光谱增感染料之间的摩尔比为至少1:6 所述{111}片状晶粒的晶粒覆盖率超过50%。还描述了包括所述感光卤化银照相胶片材料和两种支撑或自支撑X射线增强屏幕的放射照相屏/膜组合,其包含发光 荧光体,其中通过使膜材料与一对所述增强屏幕的夹层接触并将所述组合暴露于X射线,所述发光荧光体在所述材料已经被制成光谱敏感的波长范围内的发射由黑色 处理所述暴露的放射线照相胶片材料之后的白色诊断图像。
    • 39. 发明申请
    • Colour Laser Marking Methods of Security Document Precursors
    • 安全文件前体的彩色激光打标方法
    • US20140232810A1
    • 2014-08-21
    • US14241115
    • 2012-09-04
    • Bart WaumansPaul CallantIngrid Geuens
    • Bart WaumansPaul CallantIngrid Geuens
    • B41M3/14
    • B41M3/14B41M3/142B41M5/267B41M5/323B41M5/34
    • A method of colour laser marking a security document precursor including at least: a transparent biaxially stretched polyethylene terephthalate foil; at least one colourless colour forming layer for generating a colour different from black containing at least an infrared absorber a colour forming compound and a polymeric binder; and a laser markable polymeric support or a laser markable layer for generating a black colour; comprising the steps of: laser marking the colourless colour forming layer through the transparent polymeric foil with a infrared laser used in continuous wave mode to generate a colour different from black; and laser marking the laser markable polymeric support or the laser markable layer through the transparent polymeric foil with the same infrared laser but used in a pulsed mode to generate a black colour.
    • 一种彩色激光标记安全文件前体的方法,至少包括:透明双轴拉伸聚对苯二甲酸乙二醇酯箔; 至少一个无色颜色形成层,用于产生不同于至少含有红外线吸收剂的成色化合物和聚合物粘合剂的黑色; 以及用于产生黑色的可激光标记聚合物支撑体或激光可标记层; 包括以下步骤:通过使用连续波模式的红外激光通过透明聚合物箔激光标记无色成色层以产生不同于黑色的颜色; 并且通过具有相同红外激光器的透明聚合物箔片激光标记可激光标记聚合物支持体或激光可标记层,但以脉冲模式使用以产生黑色。