PHOTOELECTRIC ANALYZER Russian patent published in 1999 - IPC

FIELD: checking of media optical density. SUBSTANCE: photoelectric analyzer has optical radiation source, branched irregular light guide, electrically controlled optical locks represented by segments of liquid-crystal indicator, measuring cell, vessel with standard medium or its simulator, the second branched light guide, photoelectric transducer connected to narrow-band amplifier, amplitude detector, phase-sensitive detector consisting of two controlled electronic switches and two analog storage devices and recorder. Analyzer also includes former of pulses which control electric optical locks and electronic switches of phase-sensitive detector. Pulse former consists of intermediate divider, D-trigger and two OR-NOT gates. EFFECT: increased stability. 1 dwg