DEVICE FOR MEASURING FREQUENCY OF HARMONIC ELECTRIC OSCILLATIONS Russian patent published in 1995 - IPC

FIELD: measurement technology. SUBSTANCE: device has acoustooptic modulator, coherent flat optical wave source, focusing lens, photodetector strips linked with 1-st order diffraction beam, linear amplitude translator, indicator, synchronizer, two switches, two converting amplifiers, normalizing amplifier, and optical divider built up of transparent and semitransparent mirrors. Amplitude translator, focusing lend, and photodetector strip are arranged in tandem behind acoustooptic modulator on optical axis turned through Bragg angle corresponding to central frequency of measurement range in respect to perpendicular to wave vector of sound wave. EFFECT: improved design. 2 cl, 1 dwg