Eastman-kodak Company

Nitto-denko Corporation

Samir Y Farid

Donald P Specht

Ian R Gould

Paul A Zielinski

Annabel A Muenter

Jerome Robert Lenhard

Stephen A Godleski

Roger E Moody

Douglas Robert Robello

Chin H Chen

Neil F Haley

Joseph P Dinnocenzo

Ramanuj Goswami

Deepak Shukla

Thomas R Welter

Anthony Adin

Mark R Mis

James F Elman

Mary Ellen Craver

Lal C Vishwakarma

Robert C Daly

Michael P Cunningham

James A Van Allan

Danny R Thompson

Jerome J Looker

Conrad G Houle

John M Mangus

Lorraine Ferrar

Lee William Tutt

Mitchell Stewart Burberry

Paul B Merkel

Robert James Perry

Michel Frantz Molaire

Turan Erdogan

Kevin W Williams

Thomas G Brown

Charles H Weidner

John L Fox

Aaron S Peer

Kenneth L Payne

Susan L Mattes

Jason G Gillmore

Yeonsuk Roh

The invention relates to an optical recording material comprising: a polymeric matrix; a dewarbenzene derivative reactant capable of undergoing isomerization to a benzene product upon triplet excitation, thereby causing a change in optical properties; and a sensitizer capable of absorbing actinic radiation to cause triplet energy transfer to said reactant, wherein the algebraic sum of the excitation energy of said sensitizer and its reduction potential is at least 0.05 eV less than the oxidation potential of said reactant, thereby precluding one-electron oxidation of said reactant. The invention further relates to an optical device comprising regional variations in concentrations of reactants and products produced by triplet chain isomerization, thereby providing a pattern of intelligence.

Optical recording media with triplet-sensitized isomerization

Disclosed is a multilayer film comprising a substrate bearing an aligned liquid crystal layer wherein the liquid crystal layer contains a Lewis acid. Such a film is useful for aligning a liquid crystal material to an increased tilt angle.

Aligned liquid crystal layer containing Lewis acids and process for increasing the tilt

Disclosed is a multilayer film comprising a substrate bearing an aligned liquid crystal layer wherein the aligned liquid crystal layer contains an azolium salt represented by formula (I):  wherein the subscripts represent the ring positions and each X is independently N or C&#x2014;R; each Z is independently N, N&#x2014;R, C&#x2014;(R)(R), O, S, SO, SO, C&#x2550;O, C&#x2550;S, or C&#x2550;NR; each R group is independently hydrogen or a substituent; and Y is a charge balancing anion, which may be a separate moiety or part of an X, Z, or R; provided two or more X, Z and R groups may form a ring; provided the salt may be part of an oligomer or polymer. Such a film provides a predetermined increase in pre-tilt angle for use in liquid crystal devices.

Aligned liquid crystal layer containing azolium salts and process for increasing the tilt

An optically recorded article comprising a pattern of isomerized material in two isomeric forms in a matrix, wherein one of the isomeric forms is capable of being converted to the other form by one-electron oxidation and wherein said matrix was polymerized in-situ.

In-situ polymerized matrix for isomerized optical recording article

An optical recording material which when exposed to actinic radiation produces a change in optical properties in the exposed regions, thereby providing a pattern of intelligence for storing and retrieving information, the recording material having: a) a polymer containing a covalently bound reactant moiety which is capable of undergoing a chemical transformation upon a one electron oxidation, thus causing the change in optical properties in the exposed regions; and b) a sensitizer capable of absorbing actinic radiation to cause an initial one electron oxidation of the reactant.

Optical recording material

A method for reducing dye stain of an exposed photographic element, said element comprising a support having thereon at least one image-forming layer containing a photobleachable dye, the method comprising processing the element, and exposing the processed element, in presence of a N-oxyazinium, to radiation that can be absorbed either by the photobleachable dye or by the N-oxyazinium.

Method for reducing the dye stain in photographic elements

A UV or visible-light sensitive photobleachable dye composition substantially free of polymerizable monomer comprising a photobleachable dye and an N-oxyazinium compound, a photographic element containing such a photobleachable composition, and a method for bleaching a photographic element.

Photobleachable composition, photographic element containing the composition and photobleachable method

A photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula:

Silver halide light sensitive emulsion layer having enhanced photographic sensitivity

This invention comprises a photographic element comprising a support and at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula:

Silver halide light sensitive emulsion layer having enhanced

A photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula: ##STR1## wherein A is a silver halide adsorptive group that contains at least one atom of N, S, Se, or Te that promotes adsorption to silver halide, and Z is a light absorbing group including for example cyanine dyes, complex cyanine dyes, merocyanine dyes, complex merocyanine dyes, homopolar cyanine dyes, styryl dyes, oxonol dyes, hemioxonol dyes, and hemicyanine dyes, and XY is an fragmentable electron donor moiety in which X is an electron donor group and Y is a leaving group other than hydrogen, and wherein:

A photographic element comprises at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of formula

This invention comprises a photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula X--H, wherein X is an electron donor moiety to which a base, B.sup.-, is covalently linked and H is a leaving hydrogen atom, and wherein:

A method of forming an image comprising imagewise-exposing a thermal recording element to heat, the element comprising a support having thereon a thermally-sensitive layer comprising particles containing a colorant, the particles having a particle size between about 1 and about 25 .mu.m suspended in a matrix, the layer having an optical density no higher than about 0.5, the heating thereby causing the colorant to spread out from the particles into the matrix, thus increasing the optical density in the imagewise-exposed areas.

Imaging process based on change of optical covering power

Growing community of inventors

Rochester, NY, United States of America

Samir Y Farid