Optical sensor of physical magnitude

摘要

An optical sensor for measuring physical magnitudes, such as a differential pressure, is described. The pressure sensor comprises a deformable diaphragm (24) which separates two measurement chambers (26,28) where pressures P1 and P2 exist. An optical conductor (34) is attached to the diaphragm (24). A light source (40) allows a light beam to be radiated towards the conductor (34). An optoelectrical converter (42) performs a detection of the light energy (1) output from the light guide (34), and thus of the difference between both pressures (P1,P2).