X-ray television measuring microscope

Claim 1

An X-ray television measuring microscope intended for measuring geometric dimensions of, and distances between, elements in three dimentional objects comprising: a radiation protection chamber; a source of X-ray radiation emitting a beam from one fixed point and located in said radiation protection chamber; means for movably mounting an object to be examined in the path of said X-ray beam; means for effecting co-ordinate measuring movements of the object along two mutually perpendicular coordinates in a plane perpendicular to the axis of said X-ray beam; an X-ray sensitive television converter for converting X-ray shadow images of the object into a video signal and being located in the path of the X-ray beam, said converter having a receiving target onto which said shadow images of the object are projected; a first sighting-cross located directly in front of said receiving target and having cross-hairs, said first sighting cross being positioned on the X-ray beam axis so that the axis passes through the center of said cross-hairs; at least one optical device, having a second sighting cross with cross-hairs, for observing and sighting those outer portions of the object not visible in the X-ray shadow image, the direction of the optical axis of the at least one optical device being fixed with respect to the axis of the X-ray beam and at least one line of the cross-hairs of said second sighting cross being perpendicular to the direction of the measuring movement of the object in said chamber and lying in a common plane with the line of the cross-hairs of said first sighting cross.