FIELD: measuring technique. SUBSTANCE: apparatus for investigating liquid-crystal indicators, including the power source 1, the illuminating lamp 2, photoelectronic multiplier 5, the high voltage source 4, the rectangular pulse generator 13, two switches 14,15, also has two differentiating units 6,7, two diodes 17.18, two counters 8,9, the divider 10, the pulse shaper 16, third switch 11 and the sawtooth voltage generator 12. EFFECT: enhanced responsibility of the apparatus. 1 cl, 2 dwg
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