FIELD: physics.
SUBSTANCE: proposed meter comprises master oscillator to feed pulses to input of switch wherefrom separated pulses are fed to laser diodes. Signal from three optical radiation receivers comes into photoelectric signal processing unit and, therefrom, into amplifier. Signal proportional to thickness is sent to meter. Radiation from first laser diode falls at minor angle to sheet glass top surface to be refracted and sent to second receiver. Simultaneously, radiation from first laser diode falls at the same angle to first receiver arranged ahead of sheet glass. Radiation from second laser diode falls perpendicular to sheet surface to get to third receiver arranged behind glass sheet.
EFFECT: simplified design, higher accuracy.
2 dwg
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