Results 151 to 160 of about 325,753 (218)

Heitt Mjölnir: a heated miniature triaxial apparatus for 4D synchrotron microtomography. [PDF]

J Synchrotron Radiat
Freitas D, Butler IB, Elphick SC, Gilgannon J, Rizzo RE, Plümper O, Wheeler J, Schlepütz CM, Marone F, Fusseis F.   +9 more
europepmc   +1 more source

Green synthesis of building blocks, drug candidates and fine chemicals by barochemistry: application of high pressure in organic synthesis.

Green Chem
Xie G, Wright V, Lazarev A, Smejkal G, Gross V, Török B.   +5 more
europepmc   +1 more source

SPITROBOT-2 advances time-resolved cryo-trapping crystallography to under 25 ms

Spiliopoulou M, Hatton CE, Kollewe M, Leimkohl J, Schikora H, Tellkamp F, Mehrabi P, Schulz EC.   +7 more
europepmc   +1 more source

Wavefront estimation through structured detection in laser scanning microscopy

Fersini F, Zunino A, Morerio P, Baldini F, Booth MJ, Del Bue A, Vicidomini G.   +6 more
europepmc   +1 more source

Cross-fringe piston sensor for segmented optics

Applied Optics, 2022
This paper presents a simple slit-mask-based sensing scheme that can be applied to a robust piston error sensor for segmented optical systems, even in space. Utilizing crossed fringes generated from multiple double-slit pairs, the sensor simultaneously detects multiple points in a segmented optical system in one shot. The experiments tested six pistons
Seichi Sato, Tadahito Mizutani
semanticscholar   +4 more sources

Considerations about the differential piston for adaptive optics interferometry

SPIE Proceedings, 2000
This contribution extends a previous work where the concept of piston angular anisoplanatism was introduced and the issue of sky-coverage for large ground-based optical interferometers was raised. We obtain expressions for the temporal power spectra of phase fluctuations caused by differential piston and photon noise.
Bruno Femenía, Marcel Carbillet, Simone Esposito, Armando Riccardi   +3 more
semanticscholar   +4 more sources

Adaptive optics for array telescopes using piston-and-tilt wave-front sensing

Applied Optics, 1992
A near-infrared adaptive optics system operating at approximately 50 Hz has been used to control phase errors adaptively between two mirrors of the Multiple Mirror Telescope by stabilizing the position of the interference fringe in the combined unresolved far-field image.
Peter Wizinowich, B. A. McLeod, Michael Lloyd‐Hart, J. R. P. Angel, D’nardo Colucci, R. Dekany, Donald McCarthy, David Wittman, Ian Scott‐Fleming   +8 more
semanticscholar   +4 more sources

The Giant Magellan Telescope natural guidestar adaptive optics mode: improving the robustness of segment piston control

Astronomical Telescopes + Instrumentation, 2022
The Natural Guidestar Adaptive Optics (NGAO) system of the Giant Magellan Telescope (GMT) uses a visible-light modulated pyramid wavefront sensor (PWFS) to measure the wavefront aberrations, including residual segment piston errors.
Fernando Quirós-Pacheco, Marcos A. van Dam, Antonin H. Bouchez, Rodolphe Conan, Sebastiaan Y. Haffert, Guido Agapito, Richard Demers   +6 more
openalex   +2 more sources