Results 21 to 30 of about 168,541 (274)
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
doaj +1 more source
Ten Years of Speckle Interferometry at SOAR [PDF]
, 2018 Since 2007, close binary and multiple stars are observed by speckle interferometry at the 4.1 m Southern Astrophysical Research (SOAR) telescope. The HRCam instrument, observing strategy and planning, data processing and calibration methods, developed ...
A. Tokovinin
semanticscholar +1 more source
Promise and challenge of DUV speckle interferometry
, 2022 S.117-122The paper explains the benefits and the application limits of micro speckle interferometry (MSI) and it shows the potential for improvements when a deep UV laser source is used.
Aswendt, P.
core +1 more source
Heterodyne speckle interferometry for measurement of two-dimensional displacement.
Optics Express, 2020 This paper presented a heterodyne speckle interferometer (HSI) for the measurement of two-dimensional in-plane displacement. A diffraction grating is used to split the light source into four beams, which are then reflected into a non-mirror measurement ...
H. Hsieh, P. Kuo
semanticscholar +1 more source
Low-coherence optical fibre speckle interferometry [PDF]
, 2006 This paper describes the development of optical fibre low-coherence speckle interferometers capable of three-dimensional surface profiling with a resolution of 10–20 µm and a depth range of typically tens of centimetres.
Balboa, Itziar +2 more
core +1 more source
Astronomical optical interferometry, I: Methods and instrumentation [PDF]
Serbian Astronomical Journal, 2010 Previous decade has seen an achievement of large interferometric projects including 8-10m telescopes and 100m class baselines. Modern computer and control technology has enabled the interferometric combination of light from separate telescopes ...
Jankov S.
doaj +3 more sources
Digital, 2023 In this paper, based on Gaussian 1σ-criterion and histogram segmentation, a weighted least-squares algorithm is applied and validated on digital holographic speckle pattern interferometric data to perform phase separation on the complex interference ...
Zhenkai Chen +4 more
doaj +1 more source
Objective speckle velocimetry for autonomous vehicle odometry [PDF]
, 2012 Speckle velocimetry is investigated as a means of determining odometry data with potential for application on autonomous robotic vehicles. The technique described here relies on the integration of translation measurements made by normalized cross ...
Charrett, Thomas O. H. +3 more
core +1 more source
In-process fast surface measurement using wavelength scanning interferometry [PDF]
, 2012 A wavelength scanning interferometry system for fast areal surface measurement of micro and nano-scale surfaces which is immune to environmental noise is introduced in this paper. It can be used for surface measurement of discontinuous surface profiles
Gao, F. +4 more
core +1 more source
Speckle Interferometry at SOAR in 2018 [PDF]
The Astronomical Journal, 2019 Abstract The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2018 are given, totaling 3097 measurements of 2427 resolved pairs with separations from 11 mas to 5.″9 (median 0.″15, magnitude difference up to 7 mag) and nonresolutions of 624 targets.
Andrei Tokovinin +4 more
openaire +2 more sources