Optics: measuring and testing – By light interference – Having light beams of different frequencies
Reexamination Certificate
2006-10-10
2006-10-10
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
By light interference
Having light beams of different frequencies
C356S489000
Reexamination Certificate
active
07119905
ABSTRACT:
Systems and methods are described for spatial-heterodyne interferometry for transmission (SHIFT) measurements. A method includes digitally recording a spatially-heterodyned hologram including spatial heterodyne fringes for Fourier analysis using a reference beam, and an object beam that is transmitted through an object that is at least partially translucent; Fourier analyzing the digitally recorded spatially-heterodyned hologram, by shifting an original origin of the digitally recorded spatially-heterodyned hologram to sit on top of a spatial-heterodyne carrier frequency defined by an angle between the reference beam and the object beam, to define an analyzed image; digitally filtering the analyzed image to cut off signals around the original origin to define a result; and performing an inverse Fourier transform on the result.
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Bingham Philip R.
Hanson Gregory R.
Tobin Ken W.
Connolly Patrick
John Bruckner PC
Toatley , Jr. Gregory J.
UT-Battelle LLC
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