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Spatially-Heterodyned Holography

Patent ·
OSTI ID:880004

A method of recording a spatially low-frequency heterodyne hologram, including spatially heterodyne fringes for Fourier analysis, includes: splitting a laser beam into a reference beam and an object beam; interacting the object beam with an object; focusing the reference beam and the object beam at a focal plane of a digital recorder to form a spatially low-frequency heterodyne hologram including spatially heterodyne fringes for Fourier analysis; digital recording the spatially low-frequency heterodyne hologram; Fourier transforming axes of the recorded spatially low-frequency heterodyne hologram including spatially heterodyne fringes in Fourier space to sit on top of a heterodyne carrier frequency defined by an angle between the reference beam and the object beam; cutting off signals around an origin; and performing an inverse Fourier transform.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
UT-Battelle LLC (Oak Ridge, TN)
Patent Number(s):
7,002,691
Application Number:
10/421448
OSTI ID:
880004
Country of Publication:
United States
Language:
English

References (11)

Holographic Interferometry book January 1994
Advanced electron holography: a new algorithm for image processing and a standardized quality test for the FEG electron microscope journal April 1995
Reconstructed Wavefronts and Communication Theory* journal January 1962
Fracional–Fringe Holographic Plasma Interferometry journal January 1967
Holographic Interferometry Cookbook report January 1972
A software package for the processing and reconstruction of electron holograms journal October 1995
Holographic Interferometry journal February 1966
Wavefront Reconstruction with Diffused Illumination and Three-Dimensional Objects* journal January 1964
Wavefront Reconstruction with Continuous-Tone Objects* journal January 1963
The extended Fourier algorithm: Application in discrete optics and electron holography journal January 1994
Microscopy by reconstructed wave-fronts journal July 1949

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