Results 121 to 130 of about 5,015,013 (196)
Polarimetric calibration of the Tunable Magnetograph for the Sunrise III mission
Campos-Jara A +9 more
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Alignment of DECam-like large survey telescope for real-time active optics and error analysis
Optics Communications, 2021To obtain relatively high imaging quality in the whole field of view and simultaneously create petabytes of data with a high signal-to-noise ratio, the alignment requirements for the dark energy camera (DECam)-like wide field active optics survey ...
Yingshi Chen, Jingxu Zhang
exaly +2 more sources
Kirkpatrick–Baez active optics system at FERMI: system performance analysis
Journal of Synchrotron Radiation, 2019FERMI is the first and only seeded EUV-SXR free-electron laser (FEL) facility available to users; it operates at Elettra - Sincrotrone Trieste (Italy) and it presents five operating endstations.
Lorenzo Raimondi +2 more
exaly +2 more sources
Active optics strategy for the alignment and operation of the European Solar Telescope
Astronomical Telescopes + Instrumentation, 2022The European Solar Telescope (EST) is an on-axis 4.2-meter solar telescope, the largest solar telescope ever built in Europe. While operating, environmental effects, such as gravity, wind buffeting or thermal loads, will generate wavefront errors that ...
M. Belío-Asín +8 more
semanticscholar +1 more source
Commissioning a laser metrology truss for active optics on the Large Binocular Telescope
Astronomical Telescopes + Instrumentation, 2022LBTO, in partnership with GMTO, has been developing a laser-truss-based metrology system for the active alignment of telescope main optical components. Positive initial results convinced LBTO to commence to develop a "pathfinder" integrated operational ...
A. Rakich +9 more
semanticscholar +1 more source
Rubin Observatory active optics system status
Astronomical Telescopes + Instrumentation, 2020The Vera C. Rubin Observatory is now under construction on Cerro Pachon in Chile. This ground-based facility is designed to conduct the Legacy Survey of Space and Time (LSST), which is a decade-long time-domain optical survey of the night sky. The system
S. Thomas +8 more
semanticscholar +1 more source
Optical Activity of Biopolymers
Nature, 1969Theoretical and experimental advances have led to a reassessment of the interpretation of optical rotatory dispersion and circular dichroism of nucleic acids, proteins and related compounds. The present state of the field is reviewed in this article.
W B, Gratzer, D A, Cowburn
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Active Optics for Space Telescopes
Optical Design and Fabrication 2019 (Freeform, OFT), 2019Active optics has been proposed for application to space telescopes since the mid 1960s since it can help to relax manufacturing tolerances while guaranteeing diffraction-limited image quality, correct for thermal gradients and any errors due to launch ...
N. Devaney
semanticscholar +2 more sources
Aromaticity and Optical Activity
Journal of the American Chemical Society, 2015The relationship between aromaticity and optical activity is investigated in comparisons of heterocycles with 4n + 2 and 4n π-electrons, in cyclic ketones with and without aromatic resonance structure representations, in tautomers and pericyclic reaction partners in which only one compound of each pair is aromatic, and in partially hydrogenated cyclo ...
Veronica L, Murphy +2 more
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Journal of Agricultural and Food Chemistry, 1999
The accepted derivation of lignins from non(enzymatically)-controlled radical coupling reactions has been recently challenged, and it is relevant to ascertain unequivocally whether lignins are or are not (as normally assumed) optically active. Two approaches were used. First, DFRC (derivatization followed by reductive cleavage) dimers derived from beta-
J, Ralph +4 more
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The accepted derivation of lignins from non(enzymatically)-controlled radical coupling reactions has been recently challenged, and it is relevant to ascertain unequivocally whether lignins are or are not (as normally assumed) optically active. Two approaches were used. First, DFRC (derivatization followed by reductive cleavage) dimers derived from beta-
J, Ralph +4 more
openaire +2 more sources