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Title: Acquisition and replay systems for direct-to-digital holography and holovision

Patent ·
OSTI ID:875078
 [1];  [2]
  1. Knoxville, TN
  2. Clinton, TN
+ Show Author Affiliations

Improvements to the acquisition and replay systems for direct-to-digital holography and holovision are described. A method of recording an off-axis hologram includes: splitting a laser beam into an object beam and a reference beam; reflecting the reference beam from a reference beam mirror; reflecting the object beam from an illumination beamsplitter; passing the object beam through an objective lens; reflecting the object beam from an object; focusing the reference beam and the object beam at a focal plane of a digital recorder to form an off-axis hologram; digitally recording the off-axis hologram; and transforming the off-axis hologram in accordance with a Fourier transform to obtain a set of results. A method of writing an off-axis hologram includes: passing a laser beam through a spatial light modulator; and focusing the laser beam at a focal plane of a photorefractive crystal to impose a holographic diffraction grating pattern on the photorefractive crystal. A method of replaying an off-axis hologram includes: illuminating a photorefractive crystal having a holographic diffraction grating with a replay beam.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
DOE Contract Number:
AC05-96OR22464
Assignee:
UT-Battelle, L.L.C. (Oak Ridge, TN)
Patent Number(s):
US 6525821
Application Number:
09/477267
OSTI ID:
875078
Country of Publication:
United States
Language:
English

References (10)

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
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
Wavefront Reconstruction with Continuous-Tone Objects* journal January 1963
Holographic Interferometry journal February 1966
Holographic Interferometry Cookbook report January 1972
Holographic Interferometry book January 1994
The extended Fourier algorithm: Application in discrete optics and electron holography journal January 1994

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Related Subjects

acquisition
replay
systems
direct-to-digital
holography
holovision
improvements
described
method
recording
off-axis
hologram
splitting
laser
beam
reference
reflecting
mirror
illumination
beamsplitter
passing
objective
lens
focusing
focal
plane
digital
recorder
form
digitally
transforming
fourier
transform
obtain
set
results
writing
spatial
light
modulator
photorefractive
crystal
impose
holographic
diffraction
grating
pattern
replaying
illuminating
laser beam
fourier transform
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