1. AS A NEW ARTICLE OF MANUFACTURE USEFUL FOR THE PRODUCTION OF ENLARGED IMAGES BY MEANS OF X-RAY DIFFRACTION, IN COMBINATION, AN X-RAY TUBE CHARACTERIZED BY A TARGET WHICH FUNCITONS BOTH AS A SOURCE OF X-RAYS AND AS A WINDOW FOR X-RAY TRANSMISSION; PLANAR CONCENTRIC DISCS ARRANGED TO FORM AT LEAST ONE ANNULAR RING BETWEEN THE CIRCUMFERENCE OF THE INTERNAL DISC AND THE INNER EDGE OF THE EXTERNAL DISCS; SAID CONCENTRIC DISCS BEING SO POSITIONED IN A PLANE PARALLEL TO THE SURFACE OF SAID TARGET THAT X-RAYS EMERGING PERPENDICULARLY TO THE SURFACE OF SAID TARGET AT ITS CENTER PASS THROUGH THE CENTER OF SAID CONCENTRIC DISCS; A CIRCLE OF WIRE POSITIONED SYMMETRICALLY IN THE ANNULAR RING BETWEEN SAID CONCENTRIC DISCS; SAID CIRCLE BEING OF SUCH RADIUS THAT WHEN AN OBJECT IS PLACED ADJACENT TO THE EXTERNAL SURFACE OF SAID TARGET AN ENLARGED IMAGE OF SAID OBJECT IS FORMED.