USE OF HOLOGRAPHIC INTERFEROMETRY AND ELECTRONIC SPECKLE PATTERN INTERFEROMETRY FOR MEASUREMENTS OF DYNAMIC DISPLACEMENTS

✍ Scribed by M.A. CAPONERO; P. PASQUA; A. PAOLOZZI; I. PERONI

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 549 KB
• Volume: 14
• Category: Article
• ISSN: 0888-3270
• DOI: 10.1006/mssp.1999.1265

✦ Synopsis

The paper presents the use of Holographic Interferometry and Electronic Speckle Pattern Interferometry for the measurement of dynamic surface displacements. A concise theoretical background of the optical phenomena on which the two techniques are based is given. Analysis of holographic and speckle fringe patterns due to dynamic displacements is introduced as a generalisation of the case of fringe patterns due to static displacements. Experimental results obtained on a turbine blade, an aluminium panel and a microsatellite sandwich structure are reported.