| 摘要 |
An X-ray tube generates X-rays by permitting electrons to enter from an electron gun toward the X-ray target of an anode arranged in an anode containing section (5) and takes out the X-rays thus generated from an X-ray exit window. In particular, the anode has a linear main body section (12), and a projection (27) extending from the distal end of the main body section along the axial direction thereof. An inclining face (27a) against which electrons from the electron gun collide, and a pair of side faces (27b) arranged in parallel while holding the inclining face between are formed at the projection (27). A distance between the pair of side faces at the protrusion is set smaller than the width of the main body section in the same direction as that of the distance. With such an arrangement, incident profile of electrons to the target can be brought close to a circle and generation profile of X-rays can be brought close to a circle. A sharp enlarged perspective image can be obtained and the FOD can be shortened because a hood is not required, and thereby enlargement ratio of the enlarged perspective image can be increased. |
