Patent ID: 6362481
Filing Date: 2002-03-26
Classification: G01N,G01T

Abstract:
X-ray detector apparatus comprising:a first quantity of polycrystalline scintillating material formed to comprise a monolithic scintillator body having a face, said scintillator body disposed to receive an amount of X-ray radiation, and to project an amount of light corresponding thereto through said face of said scintillator body; a photodiode device spaced apart from said scintillator face by a gap so that said photodiode device is disposed to receive said projected light, and to produce an electric signal representing said projected light and said X-ray radiation; optical coupling material positioned in said gap to reduce refractivity of said projected light as said light traverses said gap; and a second quantity of said scintillating material, in the form of a powder, which is mixed into said optical coupling material to provide an optical coupler composition having a thermal expansivity which is substantially less than the thermal expansivity of said optical coupling material alone.