Anordnung zur Bestimmung der mittleren Hoehe und der raeumlichen Ausbildung von nicht ebenen Oberflaechen

摘要

An arrangement for checking the depth of the charge and for determining the profile of the surface comprises radiation sources and radiation detectors in different planes. he sources are arranged above the uppermost plane of the detectors and the sources of different planes are displaced with respect to each other. Source and detectors are placed at the corners of an octagon. The chronological control is effected by a comparison arrangement compensating the decay of the activity of the radiation sources.