Kinematic and deformation parameter measurement by spatiotemporal analysis of an interferogram sequence

Fu, Yu; Groves, Roger M.; Pedrini, Giancarlo; Osten, Wolfgang

doi:10.1364/ao.46.008645

Cited by 50 publications

(50 citation statements)

References 32 publications

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“…However, due to various noises in experimental data, a large number of data points should be captured for a more accurate determination of the desired phase. In practice, the phase term Δϕ normally takes the form of a series of temporal modulations by a phase modulator, and temporal phase analysis using Fourier transform, short-time Fourier transform [103] or wavelet transform [104] are employed to suppress random noise and determine phase information at any moment. If only one intensity value is available, the determination of the phase information is also possible with the help of suitable transforms provided that a high frequency carrier fringe is also present.…”

Section: Image Processing and Data Analysismentioning

confidence: 99%

Phase‐sensitive surface plasmon resonance biosensors: methodology, instrumentation and applications

et al. 2012

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International audienceSurface Plasmon Resonance (SPR) has become a central tool for label-free characterization of biomolecular interactions. Based on monitoring of amplitude characteristics, conventional SPR sensors have been extensively explored, commercialized and applied for studies of many important interactions (antigen-antibody, protein-ligand etc), but this technology still lacks of sensitivity for the detection of relatively small and low copy number compounds. Phase-sensitive SPR has recently emerged as an upgrade of this technology to resolve the sensitivity issue. Profiting from a sharp phase jump under SPR and ultra-sensitive tools of its control, this technology offers up to 100-time improvement of the detection limit, giving access to the detection of trace amounts of small molecular weight analytes (drugs etc). This paper intends to provide a tutorial on basic concepts of phase detection in SPR sensing, compare the performance of phase- and amplitude-sensitive sensors, review recent progress in the development and applications of phase-sensitive SPR sensors, and outline future prospects and trends of this technology

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Section: Image Processing and Data Analysismentioning

confidence: 99%

Phase‐sensitive surface plasmon resonance biosensors: methodology, instrumentation and applications

et al. 2012

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“…The detailed principle of the method and several applications in speckle interferometry and vibration measurement can be found in Refs. [13][14][15][16]. Fourier transform [17] is usually applied to extract the phase in temporal domain.…”

Section: The Principle Of the Concentration Measurementmentioning

confidence: 99%

“…Windowed Fourier analysis suffers due to its fixed window size, while wavelet analysis sometimes is also not a good choice because of its poor performance at low-frequency part in thephaseextraction. The best temporal processing algorithm for intensity variation signal is the combination of Fourier and windowed Fourier analysis [13]. In this experiment, the absolute concentration distribution was retrieved based on the combination of Fourier transform and windowed Fourier transform.…”

Section: The Principle Of the Concentration Measurementmentioning

confidence: 99%

The mass transfer process and the growth rate of NaCl crystal growth by evaporation based on temporal phase evaluation

Zhao

Miao

et al. 2012

Optics and Lasers in Engineering

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a b s t r a c tThe mass transfer process and the crystal growth rate have been proved to be very important in the study of crystal growth kinetics, which influence the crystal quality and morphological stability. In this paper, a new method based on temporal phase evaluation was presented to characterize the mass transfer process in situ and determine the crystal growth rate. The crystallization process of NaCl crystal growth by evaporation was monitored in situ by a Mach-Zehnder interferometer, and the absolute concentration evolution, the evaporation rate and the real-time supersaturation of solution were obtained using temporal phase analysis, which acted as a novel technique to extract phase variation along time axis recently. Based on the evaporation rate and the absolution concentration, a new method to calculate mass transfer flux during the crystal growth without the knowledge of the mass transfer coefficient was proposed, and then the crystal growth rate could also be retrieved under the hypothesis of cubic crystals. The results show that the crystal growth rate increases with the supersaturation linearly. It is in agreement with the diffusion theories, which presume that matter is deposited continuously on a crystal face at a rate proportional to the difference in concentration between the points of deposition and the bulk of solution. The method is applicable to the research of crystallization process based on evaporation or vapor diffusion of which the precise conditions of nucleation and supersaturation are usually unknown because of the complexity of the evaporation rate and crystal growth rate.

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“…The details of the WFT technique are given in Refs. [8,34]. In this case, the phase nonlinearity is more obvious in the t-axis, but milder in the x-y domain.…”

Section: Windowed Fourier Analysismentioning

confidence: 80%

Dual-wavelength image-plane digital holography for dynamic measurement

Pedrini

Hennelly

et al. 2009

Optics and Lasers in Engineering

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a b s t r a c tA dual-wavelength image-plane digital holography, combined with a windowed Fourier analysis, is presented for dynamic measurement of a vibrating object. In order to expand the range of the velocity measurement, the object is simultaneously illuminated by two lasers with different wavelengths. A sequence of digital holograms of a vibrating object is captured by a CCD camera and two wrapped phase maps are retrieved from each digital hologram. At each instant, a new phase distribution with a synthetic wavelength is obtained by subtracting these two wrapped phase maps. A windowed Fourier analysis is then applied spatially and temporally to retrieve the high-precision displacement and velocity of the tested object. Experimental results show the requirement on the camera capture frequency is reduced by the proposed method.

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Kinematic and deformation parameter measurement by spatiotemporal analysis of an interferogram sequence

Cited by 50 publications

References 32 publications

Phase‐sensitive surface plasmon resonance biosensors: methodology, instrumentation and applications

Phase‐sensitive surface plasmon resonance biosensors: methodology, instrumentation and applications

The mass transfer process and the growth rate of NaCl crystal growth by evaporation based on temporal phase evaluation

Dual-wavelength image-plane digital holography for dynamic measurement

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