Vivian K Walworth

US Patent:

20100245998, Sep 30, 2010

Filed:

Mar 29, 2010

Appl. No.:

12/749241

Inventors:

Vivian K. Walworth - Concord MA, US
W. Dennis Slafer - Arlington MA, US

Assignee:

MICROCONTINUUM, INC. - Cambridge MA

International Classification:

G02B 27/26
B05D 5/06

US Classification:

359465, 4271631

Abstract:

An aspect of the present disclosure provides for a quarter-wave retarder film that is overlaid onto a linearly-polarized stereoscopic image pair in an appropriate orientation in order to produce an image that is viewable using circularly polarized viewing glasses for increased viewing comfort and head-tilt resistance. Another aspect of the present disclosure enables the production of StereoJet-type ink jet images through the use of two separate single-sided clear polarizer substrates with the stretch orientation parallel to the running edge of the support layer. A further aspect of the present disclosure is directed to the production of laminated stereoscopic images in which the spacing of the image planes of the members of the image pair can be made in close proximity, farther proximity, or at an intermediate proximity to achieve desired optical, mechanical and/or visual results.

US Patent:

41027590, Jul 25, 1978

Filed:

Mar 7, 1977

Appl. No.:

5/775045

Inventors:

Arthur M. Gerber - Boston MA
Vivian K. Walworth - Concord MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

C25B 124
C25B 1104
C25B 1108

US Classification:

204 94

Abstract:

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

US Patent:

41027582, Jul 25, 1978

Filed:

Mar 7, 1977

Appl. No.:

5/775044

Inventors:

Arthur M. Gerber - Boston MA
Vivian K. Walworth - Concord MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

C25B 124
C25B 1104
C25B 1108

US Classification:

204 94

Abstract:

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.

US Patent:

43528740, Oct 5, 1982

Filed:

Sep 2, 1981

Appl. No.:

6/298638

Inventors:

Edwin H. Land - Cambridge MA
Vivian K. Walworth - Concord MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03C 176
G03C 102

US Classification:

430568

Abstract:

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.

US Patent:

41659864, Aug 28, 1979

Filed:

Jul 27, 1973

Appl. No.:

5/383177

Inventors:

Vivian K. Walworth - Concord MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03C 554
G03C 148
G03C 102
G03C 128

US Classification:

96 29R

Abstract:

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.

US Patent:

39763684, Aug 24, 1976

Filed:

Dec 4, 1974

Appl. No.:

5/529407

Inventors:

Mary Conlin McCann - Belmont MA
William T. Plummer - Concord MA
Vivian K. Walworth - Concord MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G02B 504
G02B 718

US Classification:

350286

Abstract:

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.

US Patent:

43539777, Oct 12, 1982

Filed:

Sep 2, 1981

Appl. No.:

6/298639

Inventors:

Arthur M. Gerber - Boston MA
Warren D. Slafer - Arlington MA
Vivian K. Walworth - Concord MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03C 102
G03C 190
G03C 1122

US Classification:

430256

Abstract:

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.

US Patent:

40604195, Nov 29, 1977

Filed:

Apr 1, 1976

Appl. No.:

5/672647

Inventors:

Arthur M. Gerber - Boston MA
Vivian K. Walworth - Concord MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03C 102
C25B 124

US Classification:

96 94R

Abstract:

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