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Temporal phase unwrapping applied to wavelength-scanning interferometry
L Paulsson1, M Sjödahl, J Kato
1Division of Experimental Mechanics, Luleå University of Technology, S-971 87 Luleå, Sweden.
Applied Optics
|March 20, 2008
Abstract:
We demonstrate the use of temporal phase unwrapping in combination with wavelength-scanning interferometry. Two unwrapping strategies are considered: fitting to a reversed exponential sequence and complex Fourier-transform ranging. Measurement of a 10-microm step by use of an external-cavity laser diode is discussed.

