Stephen R. Gottesman - Huntington NY
Edward J. Schneid - Commack NY
Grumman Aerospace Corporation - Bethpage NY
A self-supporting coded aperture array, and method for designing same, including transparent and opaque elements, the elements of the array being defined as one of transparent and opaque in correspondence with an array pattern defined by the direct product of two pseudo-noise sequences. The new arrays (called PNP arrays, for Pseudo-Noise Product) are of self-supporting geometry, simplifying fabrication and making them ideal candidates for situations where active apertures are employed, as for example, in high-energy. gamma. -ray imaging. A unique and important feature of all PNP arrays is the ability to produce reconstructed images with uniform noise regardless of the original source structure.