发明授权
- 专利标题: Photographic elements containing particular blue sensitized tabular grain emulsion
- 专利标题(中): 含有特定蓝色敏化片状颗粒乳剂的摄影元件
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申请号: US227931申请日: 1994-04-15
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公开(公告)号: US5474887A公开(公告)日: 1995-12-12
- 发明人: Kenneth J. Reed , Sang H. Kim , Thomas R. Dobles , David A. Stegman
- 申请人: Kenneth J. Reed , Sang H. Kim , Thomas R. Dobles , David A. Stegman
- 申请人地址: NY Rochester
- 专利权人: Eastman Kodak Company
- 当前专利权人: Eastman Kodak Company
- 当前专利权人地址: NY Rochester
- 主分类号: G03C7/00
- IPC分类号: G03C7/00 ; G03C1/00 ; G03C1/035 ; G03C1/16 ; G03C1/29 ; G03C7/30
摘要:
A photographic element which has a blue sensitive emulsion with broad blue spectral coverage and yet, good speed and low fog. The element has a blue sensitive silver halide tabular grain emulsion which has a tabularity of at least 25 sensitized with a dye of formula (I) and a dye of formula (II), wherein the formula (I) dye on the emulsion has a peak sensitization of between 400-445 nm and the formula (II) dye on the emulsion has a peak sensitization of between 446-500 nm: ##STR1## wherein: Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 independently represent the atoms necessary to complete a substituted or unsubstituted benzene or naphthylene;X, Y, X.sub.1 and Y.sub.1 are independently O, S, Se or MR.sub.5, provided that at least X or Y is O or NR.sub.5, where R.sub.5 is a substituted or unsubstituted alkyl or aryl;R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently represent H or a substituted or unsubstituted alkyl or aryl.
公开/授权文献
- US4334081A Preparation of substituted olefins 公开/授权日:1982-06-08
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