Photothermographic element with reduced woodgrain interference patterns
US6599686B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2002 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Jun 5, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/162
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a spectrally sensitized photothermographic silver halide element comprising a support layer having on at least one surface thereof a photothermographic composition which displays uniform image density across its surface when exposed to floodlight or uniform incandescent light exposure at radiation wavelengths to which the element is sensitive, said element comprising at least two layers, including a top layer and a photothermographic emulsion layer, said photothermographic emulsion layer comprising a binder, a light insensitive silver source, a reducing agent for silver ion and infrared radiation sensitive silver halide grains, wherein the coherent radiation is rendered more diffuse in its passage through the element than when it strikes the top layer. This may be accomplished at least in part by 1) the top layer of the element having haze induced therein of 0.05 to 30% by surface modification of that layer, 2) there being a random refractive pattern on the top layer, 3) haze being induced in the silver halide containing layer, 4) the reflective characteristics of a surface of the support layer facing the photothermographic composition have been alter…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.