Process for the control of the position of the focus of an X-ray tube and control apparatus performing said process

DETAILED DESCRIPTION The present invention relates to a process for controlling the position of the focus of an X-ray tube, which permits an instantaneous and very accurate control of the position of the focus, both in a factory or laboratory control, and during the real operation of a radiological installation.
The present invention therefore relates to a process for controlling the position of the focus of an X-ray tube, in which an image of said focus is obtained with the aid of a pinhole camera and makes it possible to carry out said position control along at least a first given axis, said X-ray tube being contained in a shield and produces an X-ray beam passing out of the shield through an outlet port, where in it comprises centering the pinhole camera on a reference axis intersecting said first axis at a point constituting a reference position relative to which said control is performed, then forming said image on the input planes of at least two contiguous, X-radiation sensitive, detector means, said input planes constituting a useful measurement length and being separated by a median line through which passes the reference axis and on either side of which is distributed the said image, followed by the comparison of the output signals generated by each of the detector means as a function of the distribution of the image, so as to obtain a difference signal having a zero value when the focus occupies said reference position.