Analysis of interferograms from a diffractive-lens-based common-path interferometer.
We present a method of numerical analysis of interferograms for a diffractive-lens-based common-path interferometer recently introduced by Elfström et al. [Opt. Express 14, 3847 (2006)OPEXFF1094-408710.1364/OE.14.003847]. Practical aspects such as the effect of higher diffraction orders upon the interferograms are considered. We show that this method can be used to solve the phase function of the inspected lens. In addition, we show that by using this method it is possible to estimate the focal length and imaging properties of the inspected lens.
Vartiainen
Ismo
I
Department of Physics and Mathematics, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland. ismo.vartiainen@joensuu.fi
Vahimaa
Pasi
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Kuittinen
Markku
M