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Electro-Optical Instrumentation: Sensing and Measuring with Lasers by Silvano Donati - University of Pavia

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Chapter 4 Laser Interferometry

Interferometry is one of the most powerful tools in measurement science. It provides a very high sensitivity, unequalled by any other techniques, and is widespread in virtually every segment of engineering and physics. Interference of light was one of the phenomena marking the birth of optics and challenging the seventeenth-century scientists to explain the nature of light, notably Newton and Huygens [1]. In the nineteenth century, though a good understanding of interference was reached, interferometry had few notable applications because of the limited coherence length of the sources then available [1]. With the advent of lasers in the 1960s, the full capability of this powerful technique was finally unleashed. ...

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