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Deep Learning in the Phase Extraction of Electronic Speckle Pattern Interferometry
ElectronicsElectronic speckle pattern interferometry (ESPI) is widely used in fields such as materials science, biomedical research, surface morphology analysis, and optical component inspection because of its high measurement accuracy, broad frequency range, and ...
Wenbo Jiang, T. Ren, Qianhua Fu
semanticscholar +1 more source
Use of diffuse reflections in tunable diode laser absorption spectroscopy: implications of laser speckle for gas absorption measurements [PDF]
, 2008 We report the effects of self-mixing interference on gas detection using tunable diode laser spectroscopy. For very weak feedback, the laser diode output intensity gains a sinusoidal modulation analogous to that caused by low finesse etalons in the ...
Hodgkinson, Jane +2 more
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Scientific Reports, 2021 The dark-field signal measures the small-angle scattering strength and provides complementary diagnostic information. This is of particular interest for lung imaging due to the pronounced small-angle scatter from the alveolar microstructure.
Sebastian Meyer +4 more
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Phase extraction in dynamic speckle interferometry: proposal of a road map
EPJ Web of Conferences, 2010 Of all the two-beam interference patterns, the ones obtained in speckle interferometry (SI) are the most difficult to be phase-demodulated. Many solutions exist in classical smooth-wave interferometry and alike techniques, both in static and dynamic ...
Jacquot P., Equisa S.
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New Orbits Based on Speckle Interferometry at SOAR. II. [PDF]
, 2016 Orbits of 44 close and fast visual binaries are computed using the latest speckle observations; 23 orbits are determined for the first time, and the rest are revisions, some of those substantial. Six combined orbits use radial velocities.
A. Tokovinin
semanticscholar +1 more source
Vibration compensating beam scanning interferometer for surface measurement [PDF]
, 2007 Light beam scanning using a dispersive element and wavelength tuning is coupled with fibre-optic interferometry to realize a new surface measurement instrument. The instrument is capable of measuring nano-scale surface structures and form deviation.
Wang, Kaiwei +3 more
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Experimental assessment of determining the average size of speckles
Вестник Самарского университета: Естественнонаучная серияThe paper proposes a method for estimating the average speckle size using experimentally recorded images of speckle fields on a CMOS matrix. This method can be useful when used in speckle interferometry methods when determining their metrological ...
Roman N. Sergeev
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Towards Reduced CNNs for De-Noising Phase Images Corrupted with Speckle Noise
Photonics, 2021 Digital holography is a very efficient technique for 3D imaging and the characterization of changes at the surfaces of objects. However, during the process of holographic interferometry, the reconstructed phase images suffer from speckle noise.
Marie Tahon +2 more
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Speckle interferometry of Hipparcos link stars – III
, 1991 We present here a third list of stars which have been tested by speckle interferometry for use in the Hubble Space Telescope link between the Hipparcos astrometric reference frame and the extragalactic VLBI reference frame.
Jauncey, David L. +7 more
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Single-axis combined shearography and digital speckle photography instrument for full surface strain characterization [PDF]
, 2005 Full characterization of the surface strain requires the measurement of six displacement gradient components of the surface strain tensor. The out-of-plane displacement gradient component may be directly measured using the full-field speckle ...
Fu, S. +3 more
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