Recording multiple spatially-heterodyned direct to digital holograms in one digital image

Hanson, Gregory R; Bingham, Philip R

Recording multiple spatially-heterodyned direct to digital holograms in one digital image

Patent · Tue Mar 25 04:00:00 EDT 2008

OSTI ID:969777

Hanson, Gregory R ^[1]; Bingham, Philip R ^[2]

Clinton, TN
Knoxville, TN

Systems and methods are described for recording multiple spatially-heterodyned direct to digital holograms in one digital image. A method includes digitally recording, at a first reference beam-object beam angle, a first spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded first spatially-heterodyned hologram by shifting a first original origin of the recorded first spatially-heterodyned hologram to sit on top of a first spatial-heterodyne carrier frequency defined by the first reference beam-object beam angle; digitally recording, at a second reference beam-object beam angle, a second spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis; Fourier analyzing the recorded second spatially-heterodyned hologram by shifting a second original origin of the recorded second spatially-heterodyned hologram to sit on top of a second spatial-heterodyne carrier frequency defined by the second reference beam-object beam angle; applying a first digital filter to cut off signals around the first original origin and define a first result; performing a first inverse Fourier transform on the first result; applying a second digital filter to cut off signals around the second original origin and define a second result; and performing a second inverse Fourier transform on the second result, wherein the first reference beam-object beam angle is not equal to the second reference beam-object beam angle and a single digital image includes both the first spatially-heterodyned hologram and the second spatially-heterodyned hologram.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN

Sponsoring Organization:: United States Department of Energy

DOE Contract Number:: AC05-00OR22725

Assignee:: UT-Battelle LLC (Oak Ridge, TN)

Patent Number(s):: 7,349,100

Application Number:: 10/607,824

OSTI ID:: 969777

Country of Publication:: United States

Language:: English

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