E.i. Dupont De Nemours and Company

Mark Leaman Armstrong

William K Smothers

Hao Chang

Krishna C Doraiswamy

Torence J Trout

Daniel J Mickish

Arthur J Taggi

The present invention provides a method and apparatus for forming a printing form from a photosensitive element to form a relief pattern. The method and apparatus thermally develop the photosensitive element by heating a composition layer of the element to cause a portion of the layer to liquefy and providing a development medium to the element to remove the liquefied composition. A conformable layer is disposed between the photosensitive element and a base support, which improves the compressibility and the contact between the photosensitive element and the development medium. The method and apparatus improve the efficiency of the removal of liquefied portions from the photosensitive element and the uniformity of the relief pattern formed.

Apparatus for thermal development with a conformable support

Method for thermal development with a conformable support

A method is disclosed for replicating (copying) a master hologram into a photosensitive layer to produce a copy of the hologram in a manner such that the copy of the hologram is an accurate and true replication of the master hologram with minimum interface-related defects. A holographic element containing a master hologram for use in contact copying is also disclosed.

Method and element for holographic replication

Wavelength response of volume holograms is altered by contact with a dry film diffusion element.

Dry film process for altering wavelength response of holograms

The invention relates to a method and system for making reflection holograms and, more specifically, for making reflection holograms from a cylindrical surface of a master. Means are provided to direct substantially monochromatic actinic radiation through a recording medium sensitive to such radiation coupled to the cylindrical surface of the master such that the angle of incidence of the radiation on the master is substantially constant.

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Wilmington, DE, United States of America

Mark Leaman Armstrong