Mechanical or thermo-optical transducer with dielectric waveguide - is coiled around measurement body and uses waveguide attenuation load variation

摘要

A mechanical- or thermooptical measurement transducer is arranged to enable nonoptical measurement parameters to be simply detected using optical systems and optically transferred. A measurement body (1) with a non-angular cross-section has a dielectric waveguide (3) wound around it. A light source emits light which passes along the waveguide (3) to a detector which measures the attenuation in the guide. The measurement body may be a solid or hollow cylinder, a slotted tube section, or a tube with elastic walls. The waveguide is clamped at both ends (2) of the coiled section. The measurement body is subjected to the measurement parameter and the waveguide thermal or mechanical loading changes accordingly. This affects the attenuation of the dielectric waveguide.