Results 1 to 10 of about 11,974 (122)
Diffraction-limited bispectrum speckle interferometry and speckle polarimetry of the young bipolar outflow source S140 IRS1 [PDF]
arXiv, 2000 We present bispectrum speckle interferometry and speckle polarimetry of the deeply embedded infrared bipolar outflow source S140 IRS1, a massive protostellar object in the L1204 molecular cloud. Using the SAO 6 m telescope, we obtained 280 mas resolution polarization maps of S140 IRS1 as well as a K-band image with diffraction-limited resolution lambda/
D. Schertl +5 more
arxiv +3 more sources
Orbits of Binary Stars: from Visual Measures to Speckle Interferometry [PDF]
The Astronomical JournalKnowledge of the orbits of visual binary stars has always been one of the fundamentals of astronomy. Based historically on the visual measures, nowadays the orbits rely more (or exclusively) on the accurate speckle data.
Andrei Tokovinin
doaj +2 more sources
Convolutional neural network optimisation to enhance ESPI fringe visibility [PDF]
EPJ Web of Conferences, 2022 The use of convolutional neuronal networks (CNN) for the treatment of interferometric fringes has been introduced in recent years. In this paper, we optimize and build a CNN model, based U-NET architecture, to maximize its performance processing ...
Crespo J.M., Moreno V.
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Sensors, 2021 In this study, a compound speckle interferometer for measuring three-degree-of-freedom (3-DOF) displacement is proposed. The system, which combines heterodyne interferometry, speckle interferometry and beam splitting techniques, can perform precision 3 ...
Hung-Lin Hsieh, Bo-Yen Sun
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Photonics, 2023 This study sought to explain the physical phenomenon that eludes the constraints of the Rayleigh criterion in the microstructure observation method using speckle interferometry, for which super-resolution has been experimentally proven; the study was ...
Yasuhiko Arai, Tong Chen
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Microshape Measurement Method Using Speckle Interferometry Based on Phase Analysis
Photonics, 2021 A method for the measurement of the shape of a fine structure beyond the diffraction limit based on speckle interferometry has been reported. In this paper, the mechanism for measuring the shape of the fine structure in speckle interferometry using ...
Yasuhiko Arai
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Deep Learning Network for Speckle De-Noising in Severe Conditions
Journal of Imaging, 2022 Digital holography is well adapted to measure any modifications related to any objects. The method refers to digital holographic interferometry where the phase change between two states of the object is of interest.
Marie Tahon +2 more
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Авіаційно-космічна техніка та технологія, 2021 The paper notes the wide possibilities and high efficiency of vibration diagnostics of parts and assemblies of power units by the method of electronic speckle interferometry (ESI), shows the feasibility of developing and improving methods for obtaining ...
Михаил Романович Ткач +5 more
doaj +1 more source
Speckle Interferometry at SOAR in 2022
The Astronomical Journal, 2023 Results of the speckle-interferometry observations at the 4.1 m SOuthern Astrophysical Research Telescope obtained during 2022 are presented: 2508 measurements of 1925 resolved pairs or subsystems and 785 nonresolutions of 611 targets; 26 pairs are ...
Brian D. Mason +3 more
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Applied Sciences, 2020 This paper presents a new processing method for denoising interferograms obtained by digital holographic speckle pattern interferometry (DHSPI) to serve in the structural diagnosis of artworks.
Ketao Yan +4 more
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