Supersensitized photographic emulsion
US4147553A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1978 |
| Grant date | Apr 3, 1979 |
| Priority date | — |
| Expiry date | Feb 7, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A silver halide photographic emulsion containing, in supersensitizing amounts, the combination of PA0 at least one compound represented by the following general formula (I): ##STR1## wherein Z.sub.1 represents the atoms necessary for forming a benzene ring or a naphthalene ring; W.sub.1 represents a sulfur atom or a selenium atom; Y represents an oxygen atom or a sulfur atom; R.sub.1 represents an alkyl group or an aryl group; and R.sub.2 represents a lower alkyl group having 1 to 6 carbon atoms in the alkyl moiety or an aryl group; PA0 At least one carbocyanine dye represented by the following general formula (II): ##STR2## wherein Z.sub.2 represents the atoms necessary for forming a thiazole ring, a selenazole ring, an oxazole ring, an imidazole ring or a pyrroline ring; Z.sub.3 represents the atoms necessary for forming an oxazole ring or an imidazole ring; R.sub.4 and R.sub.5, which may be the same or different, each represents an alkyl group; R.sub.6 represents a hydrogen atom or a lower alkyl group having 1 to 6 carbon atoms in the alkyl moiety; X.sub.a.sup..crclbar. represents an acid anion; and p represents 0 or 1 and, when an inner salt is formed, p represents 0; and PA0 A…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.