Journal ArticleDOI
Two-dimensional fringe-pattern analysis.
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Two-dimensional sinusoid fitting and Fourier transform methods of analyzing fringes to determine the wave-front topography are described and are accurate.Abstract:
Two-dimensional sinusoid fitting and Fourier transform methods of analyzing fringes to determine the wave-front topography are described. The methods are easy to apply because they do not require finding fringe centers and fringe orders. Also, they are accurate. For an active optics experiment in which we have used these techniques, experimental noise exceeds the error resulting from analysis of noise-free theoretical fringe patterns.read more
Citations
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Proceedings ArticleDOI
Polarization-based phase-shifting method for shape contours
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Camera calibration based on virtual planar targets
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Projected Fringe Pattern Analysis by the Fourier Method: Application to Vibration Studies
TL;DR: In this article, the Fourier analysis of a Ronchi ruling on a homogenous cantilever is applied to the analysis of the free-end vibration of a free-ending cantilver beam.
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Fourier transform method and temporal phase in order to measure frequency, amplitude, and surface profile of a low-frequency vibrating cantilever
Cruz Meneses-Fabian,Ramon Rodriguez-Vera,Juan A. Rayas,Fernando Mendoza-Santoyo,Gustavo Rodriguez-Zurita +4 more
TL;DR: In this paper, a novel method of phase differences extraction is applied in order to study vibrations on a homogenous cantilever. But this technique is based on the Fourier transform method and the quotient of the two adjacent frames of the patterns.
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Extended use of two crossed Babinet compensators for wavefront sensing in adaptive optics
Lancelot Paul,A. K. Saxena +1 more
TL;DR: An extended use of two crossed Babinet compensators as a wavefront sensor for adaptive optics applications is proposed, based on the lateral shearing interferometry technique in two directions, which has a higher degree of freedom in terms of subapertures and on the choice of detectors.
References
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Journal Article
Fourier-transform method of fringe-pattern analysis for computer-based topography and interferometry
TL;DR: In this article, a fast Fourier transform method of topography and interferometry is proposed to discriminate between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour generation techniques.
Journal ArticleDOI
Fourier-transform method of fringe-pattern analysis for computer-based topography and interferometry
TL;DR: In this paper, a fast Fourier transform method of topography and interferometry is proposed to discriminate between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour generation techniques.
Journal ArticleDOI
Direct phase detecting system.
Yoshiki Ichioka,M. Inuiya +1 more
TL;DR: A system for extracting the phase components of an optical traveling wave field has been constructed using the Mach-Zehnder interferometer to capture the wave field as the hologram, a photoelectronic scanning system, and an analog computing circuit.
Journal ArticleDOI
Real-time fringe-pattern analysis.
TL;DR: The task is to learn the phases of real positive intensity fringes from an optical testing interferometer using a direct analog-to-digital arctangent converter, coupled to a turns counter that automatically registers unwrapped phase.