Fig 16 - uploaded by Maria Luisa Cruz
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![Modules for the Fourier spectra of the separated terms (a) g(x,y) and (b) g*(x,y)exp[i4π(u 0 x+v 0 y)], which form the modified hologram h m (x,y) of the test object.](profile/Maria-Cruz-49/publication/221910905/figure/fig8/AS:341104621834247@1458337087450/Modules-for-the-Fourier-spectra-of-the-separated-terms-a-gx-y-and-b.png)
Modules for the Fourier spectra of the separated terms (a) g(x,y) and (b) g*(x,y)exp[i4π(u 0 x+v 0 y)], which form the modified hologram h m (x,y) of the test object.
Citations
... In 21 we proposed new method to retrieve the object phase using an in-line Gabor hologram. In this method the object is enclosed in a pupil. ...
Digital holographic microscopy is a method used to retrieve microscopic
phase objects. However, the limited CCD bandwidth, used to record the
hologram, and the aberrations of imaging lens add some noise into the
retrieval process. In this context, the use of referenceless on axis
digital holography is highly convenient due to the simplification of the
required optical setup. However, the amount of noise, due to the
conjugate and zero-order terms in the holograms tend to increase,
because these hologram terms are overlapped with the signal term. We
propose to enclose the object in a pupil and use this information to
obtain an approximation of the object phase. This approximation is used
in an iterative method, where the recovered field is cleaned from the
conjugate and zero order hologram terms. Moreover, we show that the
distortion introduced by loss of high frequency information, in the
retrieval process, can be compensated with the iterative method. The
simulation of this method had been proved with good results and they
present a fast convergence of the algorithm. In this work we present the
first experimental results applying this method.
