Eastman-kodak Company

Minnesota Mining and Manufacturing Company

Steven M Shor

Chaofeng Zou

James B Philip, Jr

Sharon Mary Simpson

Pu Zhou

Doreen Catherine Lynch

Mark C Skinner

Brian C Willett

David R Whitcomb

Henry J Gysling

Eric Julius Donaldson

Steven W Tanamachi

Stacy Marie Ulrich

Philip Hine

George W Beebe

Andrea L Opatz

Nelson B O'Bryan

James L Hartmann

Shozo Aoki

High speed photothermographic materials containing tellurium compounds and methods of using same

High speed photothermographic materials with combined chemical sensitizers and methods of using same

Photothermographic emulsions and materials that are highly sensitive to imaging radiation and that provide high contrast images are provided by making the emulsions with photosensitive silver halide grains that have been formed in the presence of a hydroxytetrazaindene or an N-heterocyclic compound comprising at least one mercapto group, such as a mercapto tetrazole. Such grains can then be chemically sensitized before or after mixing with an organic silver salt using a sulfur-, tellurium-containing, or gold-containing chemical sensitizing compound, or mixtures thereof.

Methods for making photothermographic emulsions and imaging materials

High speed photothermographic materials and methods of making and using same

An infrared sensitized photothermographic silver halide element comprising a support layer having on at least one surface thereof a photothermographic composition comprising a binder, a light insensitive silver source, a reducing agent for silver ion and infrared radiation sensitive preformed silver halide grains having number average particle size of <0.10 micron with at least 80% of all grains with &plusmn;0.05 microns of the average, in combination with an antihalation layer having an absorbance ratio of IR absorbance (before exposure)/visible absorbance (after processing) >30, and an IR absorbance of at least 0.3 within the range of 750-1400 and an optical density of less than 0.03 in the visible region.

Infrared sensitized, photothermographic article

A method and apparatus for calibrating a halftone imaging system is described which automatically compensates for drifts in overall system performance as well as for any substantial change in the imaging parameters. Calibration is achieved by optimizing the exposure level of the imaging system and linearizing the exposure level of the imaging system based on the determined optimized exposure level. The method and apparatus of the present invention are capable of calibrating an imaging system automatically by generating lookup tables and transfer functions without substantial operator intervention. Once calibration is achieved, subsequent imaging commands are automatically mapped to appropriate commands that produce a calibrated output image.

Method and device for calibrating an imaging apparatus

An infrared sensitized photothermographic silver halide element comprising a support layer having on at least one surface thereof a photothermographic composition comprising a binder, a light insensitive silver source, a reducing agent for silver ion and infrared radiation sensitive preformed silver halide grains having number average particle size of &lt;0.10 micron with at least 80% of all grains with .+-.0.05 microns of the average, in combination with an antihalation layer having an absorbance ratio of IR absorbance (before exposure)/visible absorbance (after processing) &gt;30, and an IR absorbance of at least 0.3 within the range of 750-1400 and an optical density of less than 0.03 in the visible region.

A negative-acting photothermographic element comprising a support bearing at least one heat-developable, photosensitive, image-forming photothermographic emulsion layer comprising:

Photothermographic element with pre-formed iridium-doped silver halide

Photothermographic element with core-shell-type silver halide grains

Silver halide emulsions lack stability in that their properties vary over a period of time. Various stabilizers have been used to reduce the rate and degree of variation. The combination of uracils and nitroso-substituted phenols has been found to provide a synergistic stabilization of speed in silver halide emulsions. Other stabilizers may be combined with those two classes to further improve the stability of the emulsion.

Stabilization of silver halide emulsions

Growing community of inventors

Woodbury, MN, United States of America

Steven M Shor