Time-averaged digital holography

Picart, Pascal; Leval, Julien; Mounier, Denis; Gougeon, Samuel

doi:10.1364/ol.28.001900

Cited by 119 publications

(63 citation statements)

References 4 publications

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“…In time-averaged digital holography, a vibrating surface displays dark fringes at the zeros of the Bessel function J 0 (z), where z is the amplitude of vibration [92,230]. For large-amplitude vibrations, the fringes become too numerous and difficult to resolve.…”

Section: Heterodyne Holographymentioning

confidence: 99%

Principles and techniques of digital holographic microscopy

2010

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Abstract. Digital holography is an emerging field of new paradigm in general imaging applications. We present a review of a subset of the research and development activities in digital holography, with emphasis on microscopy techniques and applications. First, the basic results from the general theory of holography, based on the scalar diffraction theory, are summarized, and a general description of the digital holographic microscopy process is given, including quantitative phase microscopy. Several numerical diffraction methods are described and compared, and a number of representative configurations used in digital holography are described, including off-axis Fresnel, Fourier, image plane, in-line, Gabor, and phase-shifting digital holographies. Then we survey numerical techniques that give rise to unique capabilities of digital holography, including suppression of dc and twin image terms, pixel resolution control, optical phase unwrapping, aberration compensation, and others. A survey is also given of representative application areas, including biomedical microscopy, particle field holography, micrometrology, and holographic tomography, as well as some of the special techniques, such as holography of total internal reflection, optical scanning holography, digital interference holography, and heterodyne holography. The review is intended for students and new researchers interested in developing new techniques and exploring new applications of digital holography. C 2010 Society of Photo-Optical Instrumentation Engineers.

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Section: Heterodyne Holographymentioning

confidence: 99%

Principles and techniques of digital holographic microscopy

2010

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“…Consequently, the phase image needs a filtering process in order to be correctly exploited for a confrontation with a physical model of the studied object. The speckle decorrelation has been studied by some authors [6]- [9]. Decorrelation can be highlighted from differences of two phases measured at two different instants.…”

Section: Speckle Noise In Doppler Phasementioning

confidence: 99%

The iterative 2D windowed Fourier transform: A SOS approach to speckle noise reduction in digital holography

Montrésor

Picart

Karray

2017

2017 25th European Signal Processing Conference (EUSIPCO)

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“…That makes the aspect of the phase difference between these two identical vibration states have the aspect shown in Fig. 7; some authors (8), (9) called it "the effect of the zero-crossing phase".…”

Section: A Second Particular Case Of Data Fieldsmentioning

confidence: 99%

Speckle Noise Reduction in Vibration Measurement by Time-Average Speckle Interferometry and Digital Holography-a Unifying Approach

BORZA

2008

JMMP

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Time-average electronic speckle pattern interferometry and digital holography are two representative full-field coherent optical techniques used in mechanical vibration measurement. In both techniques, the quantitative data processing is affected by several difficulties. The most important are the weak contrast of Bessel-type fringes and the speckle noise. The greatest obstacle in achieving complete amplitude field estimation comes from the orthogonal components of time-averaged digital holograms or speckle interferograms, where multiplicative, high-frequency phase noise covers the deterministic, vibration-related phase. Several researchers studied these problems in relation with the double-exposure method. In the present paper, the author presents in a single, unifying approach, these double-exposure methods, common to speckle interferometry and digital holography. An important reduction of multiplicative high-frequency phase noise allows obtaining fringe-averaged patterns whose intensity noise is much lower than in classical time-average holography. The analysis allows choosing the most appropriate method leading not only to a higher fringe pattern quality, lower noise and extended measurement range, but also to a method of vibration-related phase estimation, which may include in some stages subpixel precision. The method, based on the mathematical inversion of the Bessel function on monotonic intervals, is equivalent to phase unwrapping, but it only uses time-averaged fringe patterns.

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Time-averaged digital holography

Cited by 119 publications

References 4 publications

Principles and techniques of digital holographic microscopy

Principles and techniques of digital holographic microscopy

The iterative 2D windowed Fourier transform: A SOS approach to speckle noise reduction in digital holography

Speckle Noise Reduction in Vibration Measurement by Time-Average Speckle Interferometry and Digital Holography-a Unifying Approach

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