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Storage capacity of holo-interferograms
Applied Optics, 2003The practical storage capacity of a holographic medium can be found by finely comparing reconstructions from independent holograms of an information-dense object wave. With the help of two orthogonally polarized reference waves, a pair of volume holograms is recorded simultaneously at imprint densities as high as 4.1 x 10(10) bits/cm3. As a consequence
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Interferogram analysis using Fourier transform techniques
Applied Optics, 1987Fourier transform techniques have been used to map the complex fringe visibility in several types of interferogram. A Gerchberg-type iterative technique is used to eliminate edge effects. Results are presented for two specific cases: seeing measurements and interferometric tests.
C, Roddier, F, Roddier
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Vector formulation for interferogram surface fitting
Applied Optics, 1993Interferometry is an optical testing technique that quantifies the optical path difference (OPD) between a reference wave front and a test wave front based on the interference of light. Fringes are formed when the OPD is an integral multiple of the illuminating wavelength. The resultant two-dimensional pattern is called an interferogram.
D J, Fischer +3 more
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Averaging double-exposure speckle interferograms
Optics Letters, 1985Speckle-fringe quality can be improved by averaging many statistically independent interferograms together, which are generated by shifting the object's illumination angle. A technique applicable to double-exposure speckle interferograms obtained from processing two speckle patterns is described. It utilizes a computer-controlled stepping motor to tilt
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2009
The analog interference signal recorded by the detector needs to be captured and digitized at the appropriate and predetermined OPDs. In this chapter, the instrument's subsystem that produces the digital pulses to "clock" the data acquisition of the interferogram is discussed.
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The analog interference signal recorded by the detector needs to be captured and digitized at the appropriate and predetermined OPDs. In this chapter, the instrument's subsystem that produces the digital pulses to "clock" the data acquisition of the interferogram is discussed.
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Computer processing of interferograms
Czechoslovak Journal of Physics, 2004This article describes the method of computer processing of interferograms namely for apparatus adjusted to infinite fringes width, when the output is one picture on which the measured object is represented by creation of interference fringes, or finite fringes width, when the measured object is represented by the shift of existing interference fringes.
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2017
Yujie Zheng, H. Zebker
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Yujie Zheng, H. Zebker
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