The optical circuit of a speckle shift interferometer with two arms of different lengths is presented and its operating principle described. The device includes a semiconductor laser that serves as the radiation source and a digital camera interfaced to a computer.
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N. G. Vlasov and Yu. P. Presnyakov, “Spatial correlation of intensity in holography,” in: Modern State and Future of High-Speed Photography and Metrology of High-Speed Processes [in Russian], VNIIOFI, Moscow (1972), p. 121.
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Translated from Izmeritel’naya Tekhnika, No. 6, pp. 21–23, June, 2010.
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Vlasov, N.G., Shtanko, A.E. A digital correlation speckle shift interferometer. Meas Tech 53, 626–628 (2010). https://doi.org/10.1007/s11018-010-9552-4
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DOI: https://doi.org/10.1007/s11018-010-9552-4