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    • 2. 发明授权
    • Infrared sensitive silver halide photographic elements
    • 红外线敏感的卤化银照相元件
    • US5543278A
    • 1996-08-06
    • US643461
    • 1991-01-18
    • Marco BucciIvano DelpratoGiorgio Spazzapan
    • Marco BucciIvano DelpratoGiorgio Spazzapan
    • G03C1/20G03C1/28G03C1/34G03C7/20G03C7/30G03C7/392
    • G03C1/346G03C1/28G03C7/3003G03C5/164Y10S430/145
    • An infrared sensitive silver halide photographic element is disclosed comprising a support and at least one silver halide emulsion layer spectrally sensitized to the infrared portion of the electromagnetic spectrum. In particular, an infrared sensitive color photographic element, capable of providing full color images without exposure to corresponding visible radiation, is disclosed, said element comprising at least three silver halide emulsion layers on a substrate, each associated with different photographic color image forming materials, such as color couplers capable of forming dyes of different colors upon reaction with an oxidized color photographic developer, diffusing dyes, bleachable dyes, or oxidized leuco dyes. The three emulsion layers are sensitized to three different portions of the electromagnetic spectrum with at least two layers sensitized to different regions of the infrared region of the electromagnetic spectrum. The infrared sensitive element is characterized in that at least one infrared sensitized emulsion layer is associated with a 1-aryl-5-mercaptotetrazole compound substituted in the aryl group by at least one electron-attracting group.The infrared sensitive photographic element has high sensitivity to infrared radiation and undergoes less change in sensitivity during storage.
    • 公开了一种红外线敏感的卤化银照相元件,其包括对电磁光谱的红外部分进行光谱敏化的载体和至少一个卤化银乳剂层。 特别地,公开了能够提供全色图像而不暴露于相应的可见光辐射的红外敏感彩色照相材料,所述元件包括至少三个卤化银乳剂层,每个卤化银乳剂层与不同的照相彩色图像形成材料相关联, 例如能够与氧化的彩色照相显影剂反应形成不同颜色的染料的颜色成色剂,扩散染料,可漂白染料或氧化的无色染料。 三个乳剂层对电磁光谱的三个不同部分敏化,至少两层对电磁光谱的红外区域的不同区域敏感。 红外线敏感元件的特征在于,至少一个红外致敏乳剂层与通过至少一个吸电子基团在芳基中取代的1-芳基-5-巯基四唑化合物相关联。 红外线敏感的摄影元件对红外辐射具有高灵敏度,并且在储存期间的灵敏度变化较小。