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  Determining ROI for Zernike decomposition of wavefront

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I have reconstructed a wavefront (phase $\phi$ and amplitude) and want to conduct a Zernike decomposition of the phase. However, I am not sure, which "size" of the reconstructed phase to select. The FWHM or $1/e^2$ beam waist comes to mind, is this the right approach? Is there any convention?

asked Mar 28, 2017 in Applied Physics by snalx (5 points) [ no revision ]

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