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1.发明授权
公开(公告)号：US5358840A
公开(公告)日：1994-10-25
申请号：US96104
申请日：1993-07-22
CPC分类号： G03C1/0051
摘要： Silver iodobromide tabular grain emulsions of enhanced photographic sensitivity are disclosed. The silver iodobromide grains contain from 2 to less than 10 mole percent iodide, exhibit a coefficient of variation of less than 20 percent, and consisting essentially of tabular grains having opposed parallel major faces. Each of the tabular silver bromoiodide grains exhibit an iodide concentration in excess of 6 mole percent within a surface region extending to a depth of less than 0.02 .mu.m and exhibit a central iodide concentration of less than 2 mole percent.The tabular grain emulsion is prepared by providing within a reaction vessel a population of silver bromide or iodobromide host grains exhibiting a coefficient of variation of less than 20 percent and containing less than 2 mole percent iodide consisting essentially of tabular grains and introducing silver, bromide and iodide ions into the reaction vessel for deposition onto the major faces on the host tabular grains, with iodide ions accounting for at least 25 mole percent of total halide ions introduced.
摘要翻译： 公开了具有增强的照相感光度的碘溴化银片状颗粒乳剂。 碘溴化银颗粒含有2至小于10摩尔％的碘化物，显示出小于20％的变异系数，并且基本上由具有相对的平行主面的片状颗粒组成。 每个片状溴碘化银颗粒在延伸到小于0.02μm深度的表面区域内显示出超过6mol％的碘化物浓度，并显示小于2mol％的中心碘化物浓度。 片状颗粒乳剂通过在反应容器内提供一组溴化银或碘溴化物主体颗粒，其显示出小于20％的变异系数并且含有小于2摩尔％的碘化物，其基本上由片状颗粒组成，并引入银，溴和 碘离子进入反应容器，沉积在主体片状颗粒的主面上，碘离子占引入总卤化物离子的至少25摩尔％。
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公开(公告)号：US5272048A
公开(公告)日：1993-12-21
申请号：US846306
申请日：1992-03-04
申请人： Sang H. Kim , Mamie Kam-Ng , Allen K. Tsaur , Jacob I. Cohen , Richard A. Demauriac , George H. Hawks, III , John D. Baloga
发明人： Sang H. Kim , Mamie Kam-Ng , Allen K. Tsaur , Jacob I. Cohen , Richard A. Demauriac , George H. Hawks, III , John D. Baloga
IPC分类号： G03C1/015 , G03C1/035 , G03C1/043 , G03C1/07 , G03C7/00 , G03C7/26 , G03C7/30 , G03C7/396 , G03C1/46
CPC分类号： G03C7/396 , G03C7/3022
摘要： A multicolor photographic element capable of forming a viewable reversal dye image is disclosed comprising a support and, coated on the support, a blue recording yellow dye image forming layer unit, a green recording magenta dye image forming layer unit, and a red recording cyan dye image forming layer unit, each of the layer units containing in at least one layer a silver halide emulsion having a grain halide content of from 0 to 5 mole percent chloride, from. 0.5 to 20 mole percent iodide, and from 80 to 99.5 mole percent bromide, based on total silver.The photographic element is characterized in that at least one of the silver halide emulsion layers is a tabular grain emulsion layer in which the coefficient of variation of the tabular grain emulsion is less than 15 percent, based on the total grain population of the emulsion, and the total grain population of the tabular emulsion consists essentially of tabular grains having a mean thickness of less than 0.3 .mu.m and a mean tabularity of greater than 25.
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公开(公告)号：US5147772A
公开(公告)日：1992-09-15
申请号：US700020
申请日：1991-05-14
申请人： Allen K. Tsaur , Mamie Kam-Ng
发明人： Allen K. Tsaur , Mamie Kam-Ng
CPC分类号： G03C1/0051 , G03C1/043 , G03C1/38 , G03C2001/0058 , G03C2001/0156 , G03C2001/03529 , G03C2001/0357 , G03C2200/44
摘要： A process is disclosed of preparing a photographic emulsion containing tabular silver halide grains exhibiting a reduced degree of total grain dispersity. After forming a population of silver halide grain nuclei containing parallel twin planes, a portion of the silver halide grain nuclei are ripened out. The silver halide grain nuclei containing parallel twin planes remaining are then grown to form tabular silver halide grains. The total grain dispersity of the emulsion is reduced by incorporating bromide ion in the dispersing medium prior to forming the silver halide grain nuclei and, at the time parallel twin planes are formed in the silver halide grain nuclei, a polyalkylene oxide block copolymer surfactant containing at least three terminal lipophilic alkylene oxide block units each linked through a hydrophilic alkylene oxide block linking unit accounting for at least 4 percent of the molecular weight of the copolymer.
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公开(公告)号：US5210013A
公开(公告)日：1993-05-11
申请号：US699855
申请日：1991-05-14
申请人： Allen K. Tsaur , Mamie Kam-Ng
发明人： Allen K. Tsaur , Mamie Kam-Ng
CPC分类号： G03C1/0051
摘要： A photographic emulsion is disclosed containing a coprecipitated grain population exhibiting a coefficient of variation of less than 10 percent. The coprecipitated grain population consists essentially of tabular grains which are at least 50 mole percent bromide, based on silver, and which have a mean thickness in the range of from 0.080 to 0.3 .mu.m, and a mean tabularity of greater than 8.
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公开(公告)号：US5147771A
公开(公告)日：1992-09-15
申请号：US700220
申请日：1991-05-14
申请人： Allen K. Tsaur , Mamie Kam-Ng
发明人： Allen K. Tsaur , Mamie Kam-Ng
CPC分类号： G03C1/0051 , G03C1/043 , G03C1/38 , G03C2001/0058 , G03C2001/0156 , G03C2001/03529 , G03C2001/0357 , G03C2200/44 , Y10S430/138
摘要： A process is disclosed of preparing a photographic emulsion containing tabular silver halide grains exhibiting a reduced degree of total grain dispersity. After forming a population of silver halide grain nuclei containing parallel twin planes, a portion of the silver halide grain nuclei are ripened out. The silver halide grain nuclei containing parallel twin planes remaining are then grown to form tabular silver halide grains. The total grain dispersity of the emulsion is reduced by incorporating bromide ion in the dispersing medium prior to forming the silver halide grain nuclei and, at the time parallel twin planes are formed in the silver halide grain nuclei, a grain dispersity reducing concentration of a polyalkylene oxide block copolymer surfactant is present comprised of two terminal lipophilic alkylene oxide block units linked by a hydrophilic alkylene oxide block unit accounting for at least 4 percent of the molecular weight of the copolymer.
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6.发明授权Tabular grain emulsion containing reversal photographic elements exhibiting improved sharpness in underlying layers 失效包含反向摄影元素的片状颗粒乳液在下层显示出改善的锐度
公开(公告)号：US5236817A
公开(公告)日：1993-08-17
申请号：US860664
申请日：1992-03-30
申请人： Sang H. Kim , Mamie Kam-Ng , Allen K. Tsaur , Jacob I. Cohen , Richard A. Demauriac , George H. Hawks, III , John D. Baloga
发明人： Sang H. Kim , Mamie Kam-Ng , Allen K. Tsaur , Jacob I. Cohen , Richard A. Demauriac , George H. Hawks, III , John D. Baloga
CPC分类号： G03C7/396 , G03C7/3022
摘要： A multicolor photographic element capable of forming a viewable reversal dye image is disclosed comprising a support and, coated on the support, a blue recording yellow dye image forming layer unit, a green recording magenta dye image forming layer unit, and a red recording cyan dye image forming layer unit, each of the dye image forming layer units containing at least one silver halide emulsion layer comprised of a vehicle and silver halide grains having (1) a halide content of from 0 to 5 mole percent chloride, from 0.1 to 20 mole percent iodide, and from 80 to 99.9 mole percent bromide, based on total silver. At least one of the silver halide emulsion layers in one of the layer units positioned to receive exposing radiation prior to at least one of the green or red recording layer units is a tabular grain emulsion layer in which a polyalkylene oxide block copolymer is present selected to allow the preparation of tabular grains having a mean thickness of less than 0.3 .mu.m and a mean tabularity of greater than 25, accounting for greater than 97 percent of the total projected area of grains having an equivalent circular diameter of at least 0.2 .mu.m.
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7.发明授权
公开(公告)号：US5252453A
公开(公告)日：1993-10-12
申请号：US971126
申请日：1992-11-04
申请人： Allen K. Tsaur , Mamie Kam-Ng , Sang H. Kim
发明人： Allen K. Tsaur , Mamie Kam-Ng , Sang H. Kim
CPC分类号： G03C1/0051 , G03C1/015 , G03C1/043 , G03C1/047
摘要： A process is disclosed of accelerating the preparation of a photographic emulsion containing tabular silver halide grains exhibiting a reduced degree of total grain dispersity. A dispersing medium is provided containing bromide ions, and a population of silver halide grain nuclei containing parallel twin planes is formed in the dispersing medium. A portion of the grain nuclei are ripened out, and then the silver halide grain nuclei containing parallel twin planes remaining are grown to form tabular silver halide grains. A polyalkylene oxide containing both hydrophilic and lipophilic block units is selected from among those known to be capable of reducing total grain dispersity when present during nucleation. However, in this process precipitation is accelerated while maintaining low dispersity of the total grain population by forming twin planes in the grain nuclei within the pAg and temperature boundaries of Curve A in FIG. 1 and by delaying introduction of the polyalkylene oxide block copolymer surfactant until after the silver halide nuclei containing twin planes have been formed.
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公开(公告)号：US5171659A
公开(公告)日：1992-12-15
申请号：US700019
申请日：1991-05-14
申请人： Allen K. Tsaur , Mamie Kam-Ng
发明人： Allen K. Tsaur , Mamie Kam-Ng
CPC分类号： G03C1/07 , G03C1/0051 , G03C1/043 , G03C1/38 , G03C2001/0058 , G03C2001/0156 , G03C2001/03529 , G03C2001/0357 , G03C2200/44 , Y10S430/138
摘要： A process is disclosed of preparing a photographic emulsion containing tabular silver halide grains exhibiting a reduced degree of total grain dispersity. After forming a population of silver halide grain nuclei containing parallel twin planes, ripening out a portion of the silver halide grain nuclei. The silver halide grain nuclei containing parallel twin planes remaining are then grown to form tabular silver halide grains. The total grain dispersity of the emulsion is reduced by incorporating bromide ion in the dispersing medium prior to forming the silver halide grain nuclei and, at the time parallel twin planes are formed in the silver halide grain nuclei, a polyalkylene oxide block copolymer surfactant containing terminal hydrophilic alkylene oxide block units linked by a lipophilic alkylene oxide block unit accounting for at least 4 percent of the molecular weight of the copolymer.
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公开(公告)号：US5147773A
公开(公告)日：1992-09-15
申请号：US699851
申请日：1991-05-14
申请人： Allen K. Tsaur , Mamie Kam-Ng
发明人： Allen K. Tsaur , Mamie Kam-Ng
CPC分类号： G03C1/0051 , G03C1/043 , G03C1/38 , G03C2001/0058 , G03C2001/0156 , G03C2001/03529 , G03C2001/0357 , G03C2200/44
摘要： A process is disclosed of preparing a photographic emulsion containing tabular silver halide grains exhibiting a reduced degree of total grain dispersity. After forming a population of silver halide grain nuclei containing parallel twin planes, ripening out a portion of the silver haide grain nuclei. The silver halide grain nuclei containing parallel twin planes remaining are then grown to form tabular silver halide grains. The total grain dispersity of the emulsion is reduced by incorporating bromide ion in the dispersing medium prior to forming the silver halide grain nuclei and, at the time parallel twin planes are formed in the silver halide grain nuclei, a polyalkylene oxide block copolymer surfactant containing at least three terminal hydrophilic alkylene oxide block units each linked through a lipophilic alkylene oxide block linking unit accounting for at least 4 percent of the molecular weight of the copolymer.
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公开(公告)号：US07231067B2
公开(公告)日：2007-06-12
申请号：US11017398
申请日：2004-12-20
CPC分类号： H04N1/32208 , H04N1/32144 , H04N2201/3205 , H04N2201/3233 , H04N2201/327 , H04N2201/3271
摘要： A system and method for printing images for use in an authentication document from a plurality of different printers and/or capture devices. Each of the plurality of different printers and/or capture device having a unique ID. The images are printed on an authentication document with the unique ID. The system provides for verification that the presenter of an authentication document. The unique ID and/or other information may be provided in a form that is not visible under normal viewing conditions. By canning the image the unique ID may be obtained and used for authentication. The obtained ID may be compared with a known information stored at a database for confirming that the presenter of the authentication document is the individual to whom it was issued.
摘要翻译： 一种用于从多个不同的打印机和/或捕获设备打印用于认证文档的图像的系统和方法。 多个不同的打印机和/或捕获设备中的每一个具有唯一的ID。 图像打印在具有唯一ID的身份验证文档上。 该系统提供验证文档的演示者的验证。 唯一的ID和/或其他信息可以以在正常观看条件下不可见的形式来提供。 通过控制图像，可以获得唯一的ID并将其用于认证。 所获得的ID可以与存储在数据库中的已知信息进行比较，以确认认证文档的呈现者是发行者的个人。
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