Eastman-kodak Company

Byron R Sever

Kurt DeLance Sieber

Lisa Baxter Todd

Seshadri Jagannathan

Sridhar Sadasivan

Thomas N Blanton

David John Nelson

Ramesh Jagannathan

David D Tuschel

Authentication systems, apparatus, and methods authenticate an identification marking including a nanocrystalline material. One or more properties of the marking are ascertained to provide a measured profile. The measured profile is compared to at least one member of a closed set of reference profiles. Each reference profile has predetermined values of one or more properties. Each reference profile is unique within the set. At least one reference profile is characteristic of an indicator material in a nanocrystalline morphology and non-characteristic of the same indicator material in a bulk morphology.

Authentication method and apparatus for use with compressed fluid printed swatches

Phosphor compositions are disclosed comprised of a BaGd.sub.2 O.sub.4 host which is activated by at least one of Tb and Sm. These phosphors are useful as storage phosphors. An imaging plate utilizing these phosphors is also disclosed.

Barium gadolinate phosphor activated by terbium and/or samarium

An x-ray intensifying screen is disclosed containing magnesium tantalum niobium oxide as a phosphor in an ordered corundum crystalline form. In addition, small amounts of at least one alkali metal other than lithium can be present. Potassium, rubidium and cesium are each capable of increasing luminescence. The x-ray intensifying screens are useful in radiographic applications where it is important to reduce subject exposure to x-rays and also to create clear, sharp images.

Ordered corundum magnesium tantalum niobium oxide x-ray intensifying

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Rochester, NY, United States of America

Byron R Sever