TITLE

Fast Fourier demodulation

AUTHOR(S)
Carmon, Yuval; Ribak, Erez N.
PUB. DATE
June 2004
SOURCE
Applied Physics Letters;6/7/2004, Vol. 84 Issue 23, p4656
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present a fast Fourier demodulation method for calculating the distortion in a repetitive pattern. The technique is based on applying digital demodulation, then using only the anti-Hermitian part of the pattern in Fourier space. After demodulation, we are left with the Fourier transform of the sought phase information only. Using also the Hermitian part, we would have gotten the object itself. We investigate the boundaries of the technique, as related to aberration content, amplitude variations, and sensitivity to noise. © 2004 American Institute of Physics.
ACCESSION #
13203734

 

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