Direct shape measurement by digital wavefront reconstruction and multiwavelength contouring

Wagner, Christophe; Osten, Wolfgang; Seebacher, Soenke

doi:10.1117/1.602338

Cited by 248 publications

(98 citation statements)

References 10 publications

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“…In the other hand, the use of three primary colors (red, green and blue for example) digital holography led to the absolute measurement of the displacement field or index variation [17], which was not the case in monochrome holography [18][19][20].…”

Section: Resultsmentioning

confidence: 99%

Mechanical behavior study of laminate composite by three-color digital holography

Karray

Poilâne

Gargouri

et al. 2017

J. Eur. Opt. Soc.-Rapid Publ.

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A method for real time 3D measurements based on three-color digital holographic interferometry is presented and applied to the investigation of fracture mechanisms in laminate composite submitted to a three point flexural loading. A convolution algorithm allows the three monochrome images to be superposed to provide simultaneous full-field 3D measurements. Experimental results are presented and exploited to obtain the evolution of the crack tip propagation during the test.

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Section: Resultsmentioning

confidence: 99%

Mechanical behavior study of laminate composite by three-color digital holography

Karray

Poilâne

Gargouri

et al. 2017

J. Eur. Opt. Soc.-Rapid Publ.

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show abstract

“…If the noise is more excessive, or a larger synthetic wavelength is needed, one can continue with a hierarchical method using three or more wavelengths as follows [148]. Start from λ 1 and choose λ 2 > λ 1 so that 12 = λ 1 ε , i.e.…”

Section: Optical Phase Unwrappingmentioning

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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“…Because a CCD sensor has a high bit range and wide spectral bandwidth, an improvement in sensitivity and resolution can be accomplished at the cost of only requiring computational reconstruction. Numerical hologram reconstruction was initiated in the early 1970s [10,11], and digital holography was developed as a fast real-time imaging technique in the 1990s [12,13] in various applications such as phase-shifting digital holography [14], phase-contrast imaging [15,16], shape measurement [17], encrypting information [18], and refractive index tomography [19], thanks to the improvement of CCD sensitivity and advances in computer performance. Digital holography using short-coherence light [20 -22] was developed for three-dimensional microscopy, and time-domain optical coherence tomography with digital holographic microscopy was demonstrated with an application to ophthalmology [23].…”

Section: ϫ3mentioning

confidence: 99%

Fourier-domain digital holographic optical coherence imaging of living tissue

2007

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Digital holographic optical coherence imaging is a full-frame coherence-gated imaging approach that uses a CCD camera to record and reconstruct digital holograms from living tissue. Recording digital holograms at the optical Fourier plane has advantages for diffuse targets compared with Fresnel off-axis digital holography. A digital hologram captured at the Fourier plane requires only a 2D fast Fourier transform for numerical reconstruction. We have applied this technique for the depth-resolved imaging of rat osteogenic tumor multicellular spheroids and acquired cross-section images of the anterior segment and the retinal region of a mouse eye. A penetration depth of 1.4 mm for the tumor spheroids was achieved.

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Direct shape measurement by digital wavefront reconstruction and multiwavelength contouring

Cited by 248 publications

References 10 publications

Mechanical behavior study of laminate composite by three-color digital holography

Mechanical behavior study of laminate composite by three-color digital holography

Principles and techniques of digital holographic microscopy

Fourier-domain digital holographic optical coherence imaging of living tissue

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