Piezooptical measuring transducer

摘要

A piezooptical measuring transducer comprises two light sources connected to a square-pulse generator so that the luminous fluxes of each light source pass alternately through a polarizer common for both fluxes, phase-shifting plates individual for each flux, an elastic element common for both fluxes, sensitive to variations of mechanical stresses therein caused by changes in the measurand, an analyzer common for both fluxes, all placed in that order downstream of the light sources across the fluxes, the latter being alternately incident upon a photocell. The phase-shifting plates are oriented so that their axes of maximum velocity of light propagation are perpendicular to each other.