Simultaneous measurement of a.c. and d.c. stresses using a fibre-optic electronically scanned white-light interferometer

摘要

Interferometric techniques have been used extensively for the measurement of stresses in a range of industrial components. In this work. a hulk-optical Mach-Zehnder interferometer ( MZI ) is employed as a processing interferometer with a Fabry-P6rot interferometer as the sensing head in an electronically scanned white-light interferometric sensing system Unlike other arrangements discussed, this system can provide simultaneous measurements of a.c. and d.c. stresses without the use of polarizers or transmission gratings.# 1998 Elsevier Science S.A.