optical measurement using polarized light and unpolarized light.

摘要

SE measure physical quantities such as pressures, accelerations and electric currents, including currents CONTINUAS passing alternately polarized light and unpolarized light THROUGH AN OPTICAL SENSOR AMENDING Polarized Light in proportion to the magnitude of the physical quantity, WHILE polarized light passes unaffected by the magnitude. An analyzer and a photodetector converts the light from the optical sensor into an electrical signal. THE DIFFERENCE BETWEEN electrical signal generated by the polarized light and a reference signal is proportional to the magnitude of the physical quantity.