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    • 5. 发明授权
    • High speed emulsions exhibiting superior speed-granularity relationships
    • 表现出优异的速度 - 粒度关系的高速乳液
    • US5612176A
    • 1997-03-18
    • US592251
    • 1996-01-26
    • Lyn M. EshelmanDavid H. LevyPaul J. Madigan
    • Lyn M. EshelmanDavid H. LevyPaul J. Madigan
    • G03C1/005G03C1/09G03C1/29G03C1/035
    • G03C1/0051G03C1/09G03C1/29
    • Spectrally sensitized tabular grain emulsions are disclosed exhibiting increased speeds and speed-granularity relationships superior to those of conventional emulsions of the same average grain sizes. The tabular grains have {111} major faces, contain greater than 70 mole percent bromide and from 0.25 to 10 mole percent iodide, based on silver, exhibit an average aspect ratio of greater than 50 and an average equivalent circular diameter of >10 micrometers, account for greater than 90 percent of total grain projected area, and have latent image forming chemical sensitization sites on their surfaces including epitaxially deposited silver halide protrusions of a face centered cubic rock salt crystal lattice structure forming epitaxial junctions with the tabular grains. The protrusions are restricted to those portions of the tabular grains (a) located nearest peripheral edges of and (b) accounting for less than 50 percent of the {111} major faces of the tabular grains, contain a silver chloride concentration at least 10 mole percent higher than that of the tabular grains, and include a higher iodide concentration than those portions of the tabular grains extending between the {111} major faces and forming epitaxial junctions with the protrusions.
    • 公开了光谱敏化的片状颗粒乳剂,显示出比相同平均粒度的常规乳液的速度和速度 - 粒度关系更好。 片状颗粒具有{111}主面,含有大于70摩尔%的溴化物和0.25至10摩尔%的基于银的碘化物,其平均纵横比大于50,平均当量圆直径> 10微米, 占总颗粒投影面积的90%以上,并且在其表面上具有潜像形成化学致敏位点,包括外延沉积的与片状晶粒外延结构的面心立方岩盐晶格结构的卤化银突起。 突出部分限于位于最近外围边缘的片状颗粒(a)的部分,(b)占片状颗粒的{111}主面的少于50%,含有至少10摩尔的氯化银浓度 并且包括比在{111}主面之间延伸的片状颗粒的部分更高的碘化物浓度,并且形成与突起物的外延结。
    • 7. 发明授权
    • High speed emulsions exhibiting superior contrast and speed-granularity
relationships
    • 显示出优异的对比度和速度 - 粒度关系的高速乳液
    • US5614359A
    • 1997-03-25
    • US592798
    • 1996-01-26
    • Lyn M. EshelmanDavid H. LevyPaul J. Madigan
    • Lyn M. EshelmanDavid H. LevyPaul J. Madigan
    • G03C1/005G03C1/035
    • G03C1/0051
    • Spectrally sensitized tabular grain emulsions are disclosed exhibiting (1) increased speeds and (2) contrasts and speed-granularity relationships superior to those of conventional emulsions of the same average grain sizes. The tabular grains have {111} major faces, contain greater than 80 mole percent bromide, based on silver, and are substantially free of iodide, exhibit an average aspect ratio of greater than 50 and an average equivalent circular diameter of >10 micrometers, account for greater than 90 percent of total grain projected area, and have latent image forming chemical sensitization sites on their surfaces including epitaxially deposited silver halide protrusions of a face centered cubic rock salt crystal lattice structure forming epitaxial junctions with the tabular grains. The protrusions are restricted to those portions of the tabular grains (a) located nearest peripheral edges of and (b) accounting for less than 50 percent of the {111} major faces of the tabular grains. The protrusions contain silver iodide and a silver chloride concentration at least 10 mole percent higher than that of the tabular grains.
    • 公开了光谱敏化的片状颗粒乳剂,其显示出(1)增加的速度和(2)对比度和速度 - 粒度关系优于相同平均粒度的常规乳液。 片状颗粒具有{111}主面,基于银含有大于80摩尔%的溴化物,并且基本上不含碘化物,具有大于50的平均长径比和> 10微米的平均当量圆直径, 占总颗粒投影面积的90%以上,并且在其表面上具有潜像形成化学增感位点,包括外表面沉积的与片状颗粒形成外延结的立方岩盐晶格结构的卤化银突起。 突出部分限于位于最近外围边缘的片状颗粒(a)的那些部分,(b)占片状颗粒的{111}主面的少于50%。 这些突起包含碘化银和氯化银浓度比片状颗粒高至少10摩尔%。