Rigaku Denki Kabushiki Kaisha

Hideaki Uematu

An X-ray is generated when thermoelectrons emitted from a cathode impinge upon an anode, and the X-ray thus generated is taken out from a window. The cathode has a surface formed with two grooves intersecting at a right angle with each other and two coil filaments are fitted thereinto. By selectively heating one of the two coil filaments, a region on the anode upon which the thermoelectrons impinge is changed, whereby one of point- and line-focusing X-rays is selectively taken out from the window provided at a portion slightly below the face of the anode and at a wall of a casing of an X-ray tube.

Growing community of inventors

Tokyo, Japan

Hideaki Uematu