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Title: Apparatus for direct-to-digital spatially-heterodyned holography

Abstract

An apparatus operable to record a spatially low-frequency heterodyne hologram including spatially heterodyne fringes for Fourier analysis includes: a laser; a beamsplitter optically coupled to the laser; an object optically coupled to the beamsplitter; a focusing lens optically coupled to both the beamsplitter and the object; a digital recorder optically coupled to the focusing lens; and a computer that performs a Fourier transform, applies a digital filter, and performs an inverse Fourier transform. A reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form a spatially low-frequency heterodyne hologram including spatially heterodyne fringes for Fourier analysis which is recorded by the digital recorder, and the computer transforms the recorded spatially low-frequency heterodyne hologram including spatially heterodyne fringes and shifts axes in Fourier space to sit on top of a heterodyne carrier frequency defined by an angle between the reference beam and the object beam and cuts off signals around an original origin before performing the inverse Fourier transform.

Inventors:
;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176030
Patent Number(s):
7,148,969
Application Number:
11/327,851
Assignee:
UT-Battelle LLC (Oak Ridge, TN)
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Thomas, Clarence E., and Hanson, Gregory R. Apparatus for direct-to-digital spatially-heterodyned holography. United States: N. p., 2006. Web.
Thomas, Clarence E., & Hanson, Gregory R. Apparatus for direct-to-digital spatially-heterodyned holography. United States.
Thomas, Clarence E., and Hanson, Gregory R. 2006. "Apparatus for direct-to-digital spatially-heterodyned holography". United States. https://www.osti.gov/servlets/purl/1176030.
@article{osti_1176030,
title = {Apparatus for direct-to-digital spatially-heterodyned holography},
author = {Thomas, Clarence E. and Hanson, Gregory R.},
abstractNote = {An apparatus operable to record a spatially low-frequency heterodyne hologram including spatially heterodyne fringes for Fourier analysis includes: a laser; a beamsplitter optically coupled to the laser; an object optically coupled to the beamsplitter; a focusing lens optically coupled to both the beamsplitter and the object; a digital recorder optically coupled to the focusing lens; and a computer that performs a Fourier transform, applies a digital filter, and performs an inverse Fourier transform. A reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form a spatially low-frequency heterodyne hologram including spatially heterodyne fringes for Fourier analysis which is recorded by the digital recorder, and the computer transforms the recorded spatially low-frequency heterodyne hologram including spatially heterodyne fringes and shifts axes in Fourier space to sit on top of a heterodyne carrier frequency defined by an angle between the reference beam and the object beam and cuts off signals around an original origin before performing the inverse Fourier transform.},
doi = {},
url = {https://www.osti.gov/biblio/1176030}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {12}
}

Works referenced in this record:

A software package for the processing and reconstruction of electron holograms
journal, October 1995


Wavefront Reconstruction with Diffused Illumination and Three-Dimensional Objects*
journal, January 1964


Fracional–Fringe Holographic Plasma Interferometry
journal, January 1967


Reconstructed Wavefronts and Communication Theory*
journal, January 1962


Holographic Interferometry
journal, February 1966


Wavefront Reconstruction with Continuous-Tone Objects*
journal, January 1963


The extended Fourier algorithm: Application in discrete optics and electron holography
journal, January 1994