Abstract
The reconstruction quality of in-line holography suffers from the
superposition of twin images that have different foci but identical information
content. We propose a phase retrieval method using two axially displaced holograms
and a finite transmission constraint to eliminate the conjugate image. The
simulation and experimental results demonstrate a better elimination effect and a
faster rate of convergence compared with those of previously reported methods. Two
holograms can be recorded simultaneously using two cameras, thus this technique can
be used in real-time imaging.
© 2012 Chinese Optics Letters
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