Open AccessDepth-filtered digital holography
Author(s) -
Nektarios Koukourakis,
Volker Jaedicke,
Adamou Adinda-Ougba,
Sebastian Goebel,
Helge Wiethoff,
Henning Höpfner,
Nils C. Gerhardt,
Martin R. Hofmann
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.022636
Subject(s) - holography , optics , digital holography , fourier transform , angular spectrum method , spatial frequency , interference (communication) , wavelength , spatial filter , pixel , sample (material) , computer science , physics , diffraction , channel (broadcasting) , computer network , quantum mechanics , thermodynamics
We introduce depth-filtered digital holography (DFDH) as a method for quantitative tomographic phase imaging of buried layers in multilayer samples. The procedure is based on the acquisition of multiple holograms for different wavelengths. Analyzing the intensity over wavelength pixel wise and using an inverse Fourier transform leads to a depth-profile of the multilayered sample. Applying a windowed Fourier transform with a narrow window, we choose a depth-of interest (DOI) which is used to synthesize filtered interference patterns that just contain information of this limited depth. We use the angular spectrum method to introduce an additional spatial filtering and to reconstruct the corresponding holograms. After a short theoretical framework we show experimental proof-of-principle results for the method.