Silver halide photographic emulsion and silver halide photosensitive material using the same
US6280920A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2000 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Jul 28, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/03
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A silver halide photographic emulsion and a silver halide photosensitive material containing the emulsion are disclosed. The grains contained in the emulsion have a variation coefficient of distribution of an equivalent-circle diameter of all the grains of 40% or less, and 50% or more in number of all the grains in the emulsion satisfy requirements (i) to (iii) below: PA1 (i) silver iodobromide or silver bromochloroiodide tabular grains having (111) faces as major surfaces, PA1 (ii) the equivalent-circle diameter is 3.5 .mu.m or more and a thickness is 0.25 .mu.m or less, and PA1 (iii) a distance between twin planes of the tabular grain is 0.016 .mu.m or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.