113散斑干涉技术在实验力学中的应用_综述.pdfVIP

Speckle Interferometry: A Review of the Principal Methods in Use for Experimental Mechanics Applications P. Jacquot Nanophotonics and Metrology Laboratory, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland ABSTRACT: With its nearly 40 years of existence, speckle interferometry (SI) has become a complete technique, widely used in many branches of experimental mechanics. It is thus a challenging task to try to summarise in a couple of pages its principal characteristics from both theoretical and practical points of view. Admittedly, even though this goal is not met here, it appeared worth attempting to provide the photomechanics community with a discussion of the ins and outs of the technique. The necessity of a vocabulary free of ambiguity was a prerequisite, and hence the ?rst section is a plea for a clearer de?nition of the discipline. Moreover, this section offers the oppor- tunity to re-examine the basic aspects of SI. Then, the main features of the method are brie?y considered following a strengths, weaknesses, opportunities and threats (SWOT) analysis. Endowed with a lot of speci?c advantages, compared with other whole-?eld methods, SI can play an increasing role in photomechanics. KEY WORDS: deformation analysis, experimental mechanics applications, methodologies, speckle interferometry Introduction convenient to borrow an approach usually employed in a business context, i.e. the strengths, weaknesses, The birth of SI dates back at least to the early 1970s, opportunities and threats (SWOT) analysis. when Leendertz and Butters published their seminal A serious dif?culty accompanying any treatment of articles [1, 2]. These articles arouse a considerable SI lies in the absence of a clear and agreed upon interest among the holographic interferometry (HI) de?nition of the discipline. On the contrary, many community. Scientists of this ?e