Temporal phase unwrapping applied to wavelength-scanning interferometry.
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.
Paulsson
L
L
Division of Experimental Mechanics, Luleå University of Technology, S-971 87 Luleå, Sweden.
Sjödahl
M
M
Kato
J
J
Yamaguchi
I
I