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Optical coupler

United States Patent

June 15, 2004
View the Complete Patent at the US Patent & Trademark Office
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In a camera or similar radiation sensitive device comprising a pixilated scintillation layer, a light guide and an array of position sensitive photomultiplier tubes, wherein there exists so-called dead space between adjacent photomultiplier tubes the improvement comprising a two part light guide comprising a first planar light spreading layer or portion having a first surface that addresses the scintillation layer and optically coupled thereto at a second surface that addresses the photomultiplier tubes, a second layer or portion comprising an array of trapezoidal light collectors defining gaps that span said dead space and are individually optically coupled to individual position sensitive photomultiplier tubes. According to a preferred embodiment, coupling of the trapezoidal light collectors to the position sensitive photomultiplier tubes is accomplished using an optical grease having about the same refractive index as the material of construction of the two part light guide.
Majewski; Stanislaw (Grafton, VA), Weisenberger; Andrew G. (Grafton, VA)
Southeastern Universities Research Assn., Inc. (Newport News, VA)
09/ 577,701
May 23, 2000
The United States of America may have certain rights to this invention under Management and Operating Contract DE-AC05-84ER 40150 from the United States Department of Energy.