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G21K—HANDLING OF PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
G21K1/025—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation
Einrichtung zur automatischen Regulierung der Beleuchtung einer am Arbeitswagen einer automatischen,photoelektrischen Zeichenmaschine od.dgl.angeordneten Lochblende,deren Loch zum Ziehen der Striche auf eine photographische Schicht abgebildet wird