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US 4,227,112 AGranted
Gradated target for X-ray tubes
AssigneeThe Machlett Laboratories, Inc.
InventorsJohn S. Waugh, Martin Braun
Life of this patent
Estimating the term…
Abstract
An X-ray tube including a tubular envelope having therein an X-ray target comprised of a support body made of a first material and provided with a composite surface layer comprising a controlled gradient of a second material disposed in the first material, one of the materials being an X-ray emissive material and the other of the materials being a heat absorbent material, and an electron emitting cathode disposed to beam electrons onto a focal spot area of the composite surface layer.
Claims14
An X-ray target including:
- a support body having a surface overlying a composite layer comprising a first material and a controlled gradient of a second material disposed therein, one of the materials being a heat absorbent material comprised of one or more elemental components having respective atomic numbers no greater than thirty and the other of the materials being an X-ray emissive material comprised of one or more elemental components having respective atomic numbers greater than the atomic numbers of the elemental components of said one of the materials.
An X-ray tube including:
- a tubular envelope;
- an X-ray target rotatably mounted in the envelope and having an annular focal track surface overlying a composite layer comprising a first material and a controlled gradient of a second material disposed therein, one of the materials being a heat absorbent material comprised of one or more elemental components having respective atomic numbers no greater than thirty and the other of the materials being an X-ray emissive material comprised of one or more elemental components having respective atomic numbers greater than the atomic numbers of the elemental components of said one of the materials;
- and
- means for beaming electrons into the composite layer and generating X-rays which pass in a beam out of the tube.
1 more element
Dependencies are inferred from the claim text.