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    • 5. 发明授权
    • Photographic material having enhanced light absorption
    • 具有增强的光吸收的照相材料
    • US06331385B1
    • 2001-12-18
    • US09151977
    • 1998-09-11
    • Joseph C. DeatonRichard L. PartonThomas L. PennerWilliam J. HarrisonDavid E. Fenton
    • Joseph C. DeatonRichard L. PartonThomas L. PennerWilliam J. HarrisonDavid E. Fenton
    • G03C129
    • G03C1/0051G03C1/29
    • This invention comprises a silver halide photographic material comprising at least one silver halide emulsion comprising tabular silver halide grains having associated therewith at least two dye layers comprising (a) an inner dye layer adjacent to the silver halide grain and comprising at least one dye that is capable of spectrally sensitizing silver halide and (b) an outer dye layer adjacent to the inner dye layer and comprising at least one dye, wherein the dye layers are held together by non-covalent forces or by in situ bond formation; the outer dye layer adsorbs light at equal or higher energy than the inner dye layer; and the energy emission wavelength of the outer dye layer overlaps with the energy absorption wavelength of the inner dye layer. This invention also comprises a silver halide emulsion comprising silver halide tabular grains sensitized with at least one dye containing at least one anionic substituent and at least one dye containing at least one cationic substituent provides increased light absorption.
    • 本发明包括卤化银照相材料,其包含至少一种卤化银乳剂,其包含片状卤化银颗粒,其具有至少两个染色层,所述染料层包含(a)与卤化银颗粒相邻的内染料层,并且包含至少一种染料, 能够对卤化银进行光谱增感和(b)与内部染料层相邻的外部染料层并且包含至少一种染料,其中染料层通过非共价键或通过原位键形成保持在一起; 外染料层以等于或高于内染料层的能量吸收光; 并且外部染料层的能量发射波长与内部染料层的能量吸收波长重叠。本发明还包括卤化银乳剂,其包含用至少一种含有至少一个阴离子取代基的染料敏化的卤化银片状颗粒,并且至少 含有至少一个阳离子取代基的一种染料提供增加的光吸收。