Multiwavelength digital holography in the presence of vibrations: laterally resolved multistep phase-shift extraction

Seyler, Tobias; Bienkowski, Lasse; Beckmann, Tobias; Fratz, Markus; Bertz, Alexander; Carl, Daniel

doi:10.1364/ao.58.00g112

Cited by 14 publications

(5 citation statements)

References 11 publications

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“…However, this algorithm can also be applied to small region-of-interests of the holograms, enabling lateral resolved phase-shift maps. 14 An example for this method is displayed in Fig. 4.…”

Section: Phase-shift Mapsmentioning

confidence: 99%

On the influence of schlieren in large field-of-view applications of multiwavelength holography

Aslan,

Seyler,

Leclerc

et al. 2024

Practical Holography XXXVIII: Displays, Materials, and Applications

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High-precision applications of multiwavelength holography typically requires stable laboratory-like environments, which is hard to achieve in industrial applications. The influence of schlieren is crucial, especially in large fieldof-view applications, where long working distances can result in optical paths up to one meter. Schlieren is a well-known effect in interferometry and can be seen in the reconstructed object wavefronts. Small perturbations in temperature change the refractive index of air resulting in local variations of the optical path. Proper encapsulation or vacuum techniques are typically employed to compensate for this. In this work, we investigate the impact of schlieren on multiwavelength holography and propose a compensation method. The sensor used is a Mach-Zehnder-based interferometer with a field-of-view of 17.9 mm × 13.4 mm and a camera with 9344 px × 7000 px. A mirror was positioned at a distance of 1 m in front of the sensor. We performed holographic and interferometric measurements with and without an encapsulating pipe around the beam to investigate the influence of schlieren. The deviations of the phase shifts of the holographic data were laterally resolved using a modified version of the algorithm proposed by Cai et al. The fringe patterns of the interferometric data captured with different exposure times and frame rates were analyzed using a sinusoidal fit and discrete Fourier transformations (DFT) to show lateral frequency deviations. Both methods show that encapsulation leads to improved measurements. A potential compensation method is proposed.

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Section: Phase-shift Mapsmentioning

confidence: 99%

On the influence of schlieren in large field-of-view applications of multiwavelength holography

Aslan,

Seyler,

Leclerc

et al. 2024

Practical Holography XXXVIII: Displays, Materials, and Applications

Self Cite

View full text Add to dashboard Cite

show abstract

“…Measurements at different wavelengths may be parallelized with angular multiplexing [81] at the cost of spatial resolution. Translations between measurements (i.e., drift) can be compensated [82,83]. To reduce decorrelation errors, instrument stiffness and measurement speed should be increased.…”

Section: Multiwavelength Digital Holographymentioning

confidence: 99%

Technology Selection for Inline Topography Measurement with Rover-Borne Laser Spectrometers

Ryan,

Haist,

Laskin

et al. 2024

Sensors

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This work studies enhancing the capabilities of compact laser spectroscopes integrated into space-exploration rovers by adding 3D topography measurement techniques. Laser spectroscopy enables the in situ analysis of sample composition, aiding in the understanding of the geological history of extraterrestrial bodies. To complement spectroscopic data, the inclusion of 3D imaging is proposed to provide unprecedented contextual information. The morphological information aids material characterization and hence the constraining of rock and mineral histories. Assigning height information to lateral pixels creates topographies, which offer a more complete spatial dataset than contextual 2D imaging. To aid the integration of 3D measurement into future proposals for rover-based laser spectrometers, the relevant scientific, rover, and sample constraints are outlined. The candidate 3D technologies are discussed, and estimates of performance, weight, and power consumptions guide the down-selection process in three application examples. Technology choice is discussed from different perspectives. Inline microscopic fringe-projection profilometry, incoherent digital holography, and multiwavelength digital holography are found to be promising candidates for further development.

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“… 64 Phase-shifting reconstruction eliminates the artifacts of DC and, first-order twin images, conditioned upon accurate phase shifting. 14 , 59 , 65 – 71 …”

Section: Principles Of Qpimentioning

confidence: 99%

Quantitative phase imaging techniques for measuring scattering properties of cells and tissues: a review—part I

Goswami,

Anastasio,

Popescu

2024

J. Biomed. Opt.

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Quantitative phase imaging (QPI) techniques offer intrinsic information about the sample of interest in a label-free, noninvasive manner and have an enormous potential for wide biomedical applications with negligible perturbations to the natural state of the sample in vitro. Aim:We aim to present an in-depth review of the scattering formulation of light-matter interactions as applied to biological samples such as cells and tissues, discuss the relevant quantitative phase measurement techniques, and present a summary of various reported applications.Approach: We start with scattering theory and scattering properties of biological samples followed by an exploration of various microscopy configurations for 2D QPI for measurement of structure and dynamics.Results: We reviewed 157 publications and presented a range of QPI techniques and discussed suitable applications for each. We also presented the theoretical frameworks for phase reconstruction associated with the discussed techniques and highlighted their domains of validity. Conclusions:We provide detailed theoretical as well as system-level information for a wide range of QPI techniques. Our study can serve as a guideline for new researchers looking for an exhaustive literature review of QPI methods and relevant applications.

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Multiwavelength digital holography in the presence of vibrations: laterally resolved multistep phase-shift extraction

Cited by 14 publications

References 11 publications

On the influence of schlieren in large field-of-view applications of multiwavelength holography

On the influence of schlieren in large field-of-view applications of multiwavelength holography

Technology Selection for Inline Topography Measurement with Rover-Borne Laser Spectrometers

Quantitative phase imaging techniques for measuring scattering properties of cells and tissues: a review—part I

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