SYSTEM FOR MONITORING ANGULAR DISPLACEMENTS OF A ROTATING TRAY AND APPLICATION TO AN X-RAY SPECTROMETER

摘要

The invention relates to a system for controlling the rotation of a turntable T1 comprising an interferometer, the measurement arms of which are made with trihedra in the form of wedges of glass cubes P1, P2 fixed on the turntable T1 and making it possible for weak rotations of the plate T1 always reflect in the same direction the light they receive from a source S2. A birefringent plate LB is placed in one of the arms and two receivers R1, R2 receiving by analyzers A1, A2 the light provided by the interferometer make it possible to detect displacements of the corners of cubes P1, P2 therefore rotations of the plate T2 . /P P The invention is applied to an X-ray spectrometer.