Polaroid Corporation

Vivian K Walworth

Arthur M Gerber

William T Plummer

Warren D Slafer

Edwin H Land

John J McCann

Myron A Seiden

Mary Conlin McCann

Mary A McCann

A method for forming photosensitive silver halide grains which comprises coalescing a fine-grain silver halide emulsion layer carried on a substantially planar surface of a support.

Method for forming a photosensitive silver halide element

A method for forming a photosensitive element comprising a plurality of single effective silver halide grains in a predetermined spaced array which comprises coalescing a fine-grain silver halide emulsion in a plurality of predetermined spaced depressions in a surface, wherein said coalescence is carried out by contacting said fine-grain emulsion with a silver halide solvent in the vapor phase.

A photosensitive silver halide element comprising a support carrying photosensitive silver halide grains in a predetermined spaced array is prepared by a method which comprises at least partially coalescing fine-grain silver halide in a plurality of spaced depressions in a hydrophobic layer, superposing said layer with a hydrophilic layer during or subsequent to said coalescence, and then separating said hydrophilic layer and said hydrophobic layer whereby said coalesced silver halide grains are retained on said hydrophilic layer in a pattern corresponding substantially to the pattern of said spaced depressions.

A fine-grain emulsion in a plurality of predetermined spaced depressions is coalesced to form, in situ, a plurality of single effective silver halide grains in a predetermined spaced array by the action of a solution of a silver halide solvent containing a dissolved silver salt.

Photosensitive silver halide emulsion layers are formed by mixing a solution of a water-soluble complex of silver ion with a polymeric thickening agent, applying the thus formed mixture to a permeable substrate and crystallizing photosensitive silver halide grains therein by decomplexation of said silver halide complex within the layer.

Method for making photosensitive silver halide emulsion layers

Photosensitive substituted-halide silver halide emulsions are prepared by substituting bromide and/or iodide anions for part of the chloride anions of a silver iodochloride emulsion. These substituted-halide silver halide emulsions are particularly useful as negative working silver halide emulsions in diffusion transfer processes.

Substituted-halide silver halide emulsions and products containing same

The present invention is directed to a method for forming the crystals of a photographic silver halide emulsion which comprises crystallizing silver halide grains from a solution of a water-soluble complex of silver halide complexed with excess halide ions. The crystals may be sensitized before the binder is added.

Method of making silver halide emulsions

An electrolytic cell for generating silver ions and halide ions for the formation of photosensitive silver halide grains wherein the cathode comprises elemental halogen and electrically conductive carbon.

Method of electrolytically forming silver halide grains utilizing a

An electrolytic cell for generating silver ions and halide ions for the formation of photosensitive silver halide grains wherein the anode comprises particulate silver.

Photosensitive silver halide emulsions are prepared by the precipitation of silver halide grains from silver and halide ions generated by electrolysis.

Method of forming silver halide grains by electrolysis

An adapter for operatively coupling a reflex camera having a preprogrammed automatic cycle of operation to an optical instrument such as a microscope or telescope. The adapter includes mechanisms which permit the operator to selectively modify the preprogrammed cycle of operation for the purpose of making extended time exposures or allowing vibrations induced by the movement of a camera reflex member to subside prior to initiating film exposure.

Adapter for operatively coupling an automated camera to an  optical

The invention is an optical element, one version of which is useful for operating an automatic exposure control of a self-contained camera coupled to a microscope without detracting from the brightness of the magnified image to be recorded on the camera's film format. The article includes three reflecting surfaces arranged to extract a small part of the light emerging from the microscope's eyepiece and direct it into the photodetector of the automatic exposure control. A lensrefracts the light, after the third reflection, to improve the distribution of the light onto the camera's photodetector. The article is suitable for manufacture as a homogeneous molding of transparent plastic.

Special optical element for camera to microscope adaptor

Silver halide emulsion layers are formed by applying a water-soluble silver halide complex to a gelled substrate, and treating to decomplex to form silver halide crystals therein.

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Concord, MA, United States of America

Vivian K Walworth