Silver brom(oiod)ide emulsions of increased sensitivity in the near infrared
US5264336A · kind A · utility
1Cited by
8References
7Claims
0Family size
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Key dates
| Filing date | Apr 10, 1991 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Apr 10, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic emulsion is disclosed in which an infrared spectral sensitizing dye is adsorbed to the surface of silver bromide grains optionally containing iodide. The grains are formed in the presence of a hexacoordination complex of iron and at least three cyanide ligands to counteract dye desensitization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.