Two-step phase shifting for optical nondestructive testing
نویسندگان
چکیده
منابع مشابه
Two-step phase-shifting SPIDER
Comprehensive characterization of ultrafast optical field is critical for ultrashort pulse generation and its application. This paper combines two-step phase-shifting (TSPS) into the spectral phase interferometry for direct electric-field reconstruction (SPIDER) to improve the reconstruction of ultrafast optical-fields. This novel SPIDER can remove experimentally the dc portion occurring in tra...
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A two-step self-tuning phase-shifting method is presented. The phase-step between the two interferograms is not known when the experiment is performed. Our demodulating method finds, in a robust way, this unknown phase-step. Once the phase-step is estimated we proceed to phase demodulate the interferograms. Moreover our method only requires the fringe patterns to have a constant unknown phase-s...
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Conventional methods of quadrature phase-shifting holography require two holograms and either intensity distribution of the reference wave or that of the object wave to reconstruct an original object without the zero order and the twin-image noise in an on-axis holographic recording setup. We present a technique called two-step-only quadrature phase-shifting holography in which solely two quadr...
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Fluorescence holographic microscope (FINCHSCOPE) is a motionless fluorescence holographic imaging technique based on Fresnel incoherent correlation holography (FINCH) that shows promise in reconstructing three-dimensional fluorescence images of biological specimens with three holograms. We report a developing two-step phase-shifting method that reduces the required number of holograms from thre...
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We present a Phase Shifting robust method for irregular and unknown phase steps. The method is presented as a phase refinement strategy that uses as initial guess a coarsely computed phase corrupted with artifacts produce by an unprecise phase steps calibration. Then the algorithm, iteratively, refines the phase field and estimates the real phase steps by incorporating, effectively, redundant i...
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ژورنال
عنوان ژورنال: SPIE Newsroom
سال: 2009
ISSN: 1818-2259
DOI: 10.1117/2.1200904.1533