FIELD: physics. SUBSTANCE: luminescent mark is applied on surface of object, it is irradiated with stimulating radiation with length greater than time of initiation of luminescence. Then flux of stimulating radiation is stopped with the aid of optical shutter and window through which light reflected from mark hits photographic detector is open. Code of object is determined by kinetics of scintillation decay of mark. EFFECT: enhanced accuracy and reliability of process. 5 cl, 1 dwg
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