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

Abstract

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.

Inventors:
 [1];  [2]
  1. Knoxville, TN
  2. Clinton, TN
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
875078
Patent Number(s):
US 6525821
Application Number:
09/477267
Assignee:
UT-Battelle, L.L.C. (Oak Ridge, TN)
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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; /356/359/

Citation Formats

Thomas, Clarence E, and Hanson, Gregory R. Acquisition and replay systems for direct-to-digital holography and holovision. United States: N. p., 2003. Web.
Thomas, Clarence E, & Hanson, Gregory R. Acquisition and replay systems for direct-to-digital holography and holovision. United States.
Thomas, Clarence E, and Hanson, Gregory R. 2003. "Acquisition and replay systems for direct-to-digital holography and holovision". United States. https://www.osti.gov/servlets/purl/875078.
@article{osti_875078,
title = {Acquisition and replay systems for direct-to-digital holography and holovision},
author = {Thomas, Clarence E and Hanson, Gregory R},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/875078}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {1}
}

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


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


Holographic Interferometry
journal, February 1966


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