Simultaneous measurement of ac and dc 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 bulk-optical Mach-Zehnder interferometer (MZI) is employed as a processing interferometer with a Fabry-Perot 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. (C) 1998 Elsevier Science S.A. [References: 13]