Patent ID: 7664229

Claim:
An X-ray tube comprising: an anode housing unit having an X-ray emission window for taking out X-rays generated therein; an anode disposed inside said anode housing unit and having an X-ray target; and an electron gun for emitting electrons toward said X-ray target to generate X-rays in a direction from said X-ray target toward said X-ray emission window; and wherein said anode housing unit has a pair of conductive flat portions disposed so as to oppose each other while sandwiching an electron incidence surface of said X-ray target, said pair of conductive flat portions disposed in parallel to a reference plane, said reference plane containing: a first reference line that joins an electron emission exit center of said electron gun and an electron incidence surface center of said X-ray target; and a second reference line that is a straight line intersecting the first reference line on the electron incidence surface of said X-ray target and joins a center of said X-ray emission window and the electron incidence surface center of said X-ray target.