Photographic material having enhanced light absorption
US6620581B1 · kind B1 · utility
7Cited by
13References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2000 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Dec 3, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/29
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention comprises a silver halide photographic material comprising at least one silver halide emulsion comprising silver halide grains having associated therewith at least two dyes:(a) a first dye that has at least one anionic substituent and that is capable of spectrally sensitizing a silver halide emulsion; and(b) a second dye that absorbs light at an equal or shorter wavelength than the first dye and that has at least one cationic substituent and that is highly fluorescent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.