Such signals may be encountered in industrial applications like mining or construction technologies, in measurements of resonant frequencies of machines or bridges and last but not least in the measurement of small deformations or spatial distributions of temperature. It allows avoiding a physical contact with a measured object that would originate spurious signals causing errors greater than the values to be measured. The interferometric method is suitable for signals that require a noninvasive and noncontact method. Random addition to a signal can practically disqualify many techniques for their eventual application in accurate measurements of displacement or vibrations. In this chapter we discuss wide range of aspects, which greatly facilitate the launch of Michelson interferometer in in-situ conditions. There are many papers assuming the use of an interferometer and focusing on measured results, but there are not many works offering practical knowledge on how to construct and run Michelson interferometer. It is broadly used in sensor applications. Michelson interferometer is used in metrology of small amplitude nonelectric physical quantities for its accuracy, noncontact and noninvasive procedure.
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