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Proceedings Paper

Principles of digital holographic interferometry
Author(s): Thomas M. Kreis; Werner P. O. Jueptner; Juergen Geldmacher
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Paper Abstract

Fresnel or Fraunhofer hologram s can be recorded by CCD arrays as long as the sampling theorem is fulfilled. The numerical reconstruction of the wavefields is performed either by the discrete finite Fresnel transform or by solving the diffraction integral using the convolution theorem. The availability of the digitally evaluated complex wavefield instead of only the intensity field in optical reconstruction allows the subtraction of the phase distributions belonging to two states of the object to yield the sign-correct interference phase distribution with high accuracy. A numerical compensation for excess motion as well as effective filtering of the interference phase modulo 2(pi) are feasible.

Paper Details

Date Published: 30 June 1998
PDF: 10 pages
Proc. SPIE 3478, Laser Interferometry IX: Techniques and Analysis, (30 June 1998); doi: 10.1117/12.312966
Show Author Affiliations
Thomas M. Kreis, Bremen Institute of Applied Beam Technology (Germany)
Werner P. O. Jueptner, Bremen Institute of Applied Beam Technology (Germany)
Juergen Geldmacher, Bremen Institute of Applied Beam Technology (Germany)

Published in SPIE Proceedings Vol. 3478:
Laser Interferometry IX: Techniques and Analysis
Malgorzata Kujawinska; Gordon M. Brown; Mitsuo Takeda, Editor(s)

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