Patent ID: 8189742
Filing Date: 2012-05-29
Classification: H01J

Abstract:
1. An exposure tube component for electromagnetic X-ray generation, comprising: an electron beam source being capable of emitting an electron beam; a deflection device being arranged such that the deflection device is capable of deflecting the emitted electron beam; an anode having a rotational axis, wherein the anode is pivoted around the rotational axis; and a lateral emitting window arranged in a direction perpendicular to the rotational axis; wherein the anode comprises a first focal spot region and a second focal spot region, wherein the first focal spot region forms an annular surface of the anode that is concentrically arranged around the rotational axis, wherein the deflection device is adapted to deflect the emitted electron beam to modify a first portion of the emitted electron beam, which first portion is irradiating the first focal spot region, and a second portion of the emitted electron beam, which second portion is irradiating the second focal spot region, wherein the second focal spot region is recessed over the first focal spot region when seen from the electron beam source, and wherein the first focal spot region, when being irradiated by the first portion of the emitted electron beam, is adapted to generate an electromagnetic X-ray beam, which electromagnetic X-ray beam is oriented to exit the exposure tube component in a predetermined direction through the lateral emitting window, and wherein the second focal spot region, when being irradiated by the second portion of the emitted electron beam, is adapted to avoid that a possible electromagnetic X-ray beam generated by the second portion of the emitted electron beam is orientated to exit the exposure tube component through the lateral emitting window.