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US 5,349,192 AGranted
Solid state detector for polarized x-rays
AssigneeWisconsin Alumni Research Foundation
InventorJames F. Mackay
Life of this patent
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Abstract
A solid state x-ray detector has a set of bilayers formed on its front surface. Each bilayer includes a spacing layer and an absorbing layer which have different indexes of refraction, and the impinging x-rays strike the bilayers at an angle which satisfies the Bragg condition. As a result, x-rays polarized in one direction are substantially reflected while x-rays polarized in an orthogonal direction pass through the bilayers for detection by the solid state x-ray detector.
Claims4
A solid state polarized x-ray detector which comprises:
- a solid state x-ray detector for producing an electric current which is indicative of the flux density of x-rays impinging on a substantially flat surface;
- a bilayer formed on the flat surface and including a spacing layer of a first material and an absorbing layer of a second material said first and second materials having substantially different indexes of refraction and a front surface on the bilayer being oriented at an angle .theta. with respect to the direction of the impinging x-rays such that a substantial portion of the impinging x-rays polarized in the direction in the plane of the front surface are reflected while a substantial portion of the impinging x-rays polarized in direction orthogonal thereto pass through the bilayer to impinge the flat surface of the solid state x-ray detector.
Dependencies are inferred from the claim text.