Results 51 to 60 of about 1,567 (171)

Piston phase compensation of tiled apertures in the presence of turbulence and thermal blooming

, 2014
With current phasing technology, the individual beamlets within a tiled aperture can be phased in piston to coherently combine at the target. In practice, this piston phasing of the optical beamlet trains is accomplished using a point-source target.
Thornton, Douglas E., Spencer, Mark F., Bos, Jeremy, Hyde, Milo W., IV   +3 more
core   +1 more source

Emerging adaptive optics facility at Large Binocular Telescope Observatory

The Large Binocular Telescope (LBT) Observatory pioneered Adaptive Optics (AO) technologies such as Adaptive Secondary Mirror (ASM), Pyramid wavefront sensor, and Ground-layer AO using Rayleigh lasers at 8 to 10m class telescopes.
Cavallaro, Alessandro, Bec, Matthieu, Herbst, Tom, Taylor, Gregory, Bertram, Thomas, Smithwright, Mark, PIAZZESI, Roberto, PINNA, Enrico, Zhang, Xianyu, MASCIADRI, Elena, ESPOSITO, Simone, Ragland, Sam, Choi, Heejoo, Biasi, Roberto, Briegel, Florian, Hill, John, Veillet, Christian, Mechtley, Brandon, Power, Jennifer, Kim, Daewook, Shields, Joseph, Guerra, Juan Carlos, Lefebvre, Michael, FARINATO, JACOPO, ROSSI, Fabio, Close, Laird, AGAPITO, Guido, Brusa, Guido, PEDICHINI, Fernando, BERGOMI, Maria, Gallieni, Daniele, Peretz, Eliad, RICCARDI, Armando, Conrad, Al, Radhakrishnan, Kalyan, MARAFATTO, Luca, Miller, Douglas, RAGAZZONI, Roberto   +37 more
core   +1 more source

Piston Temperature Measurement by Use of Thermographic Phosphors and Thermocouples in a Heavy-Duty Diesel Engine Run Under Partly Premixed Conditions

, 2005
Piston temperature experiments were conducted in a single-cylinder heavy-duty Diesel research engine, based on the Volvo Powertrain D12C engine both by use of optical temperature sensitive phosphor and of thermocouples mounted on the piston surface.
Husberg, Tobias,, Alaa Omrane, Omrane, Alaa, Savo Gjirja, Husberg, Tobias, Ingemar Denbratt, Denbratt, Ingemar,, Engström, Johan A Skifs,, Denbratt, Ingemar, Johan Engström, Tobias Husberg, Engstr\uf6m, Johan A Skifs, Gjirja, Savo,, Alden, M.,, Gjirja, Savo, Marcus Aldén, Omrane, Alaa,, Alden, M.   +17 more
core   +1 more source

Effect of the Keck telescope`s segmented primary on the performance on the Keck adaptive optics system [PDF]

, 1997
The 349 degree of freedom Keck adaptive optics system will be mapped on to the 36 segment Keck primary mirror. Each telescope segment is independently controlled in piston and tilt by an active control system and each segment also has its own set of ...
Gavel, D.
core  

The atmospheric piston simulator for LINC-NIRVANA and Interferometric observations of massive young stellar objects

, 2011
The scope of this dissertation is two - fold. The first part describes the design, construction and verification of the atmospheric piston simulator.
Follert, Roman
core   +1 more source

The Optical Piston [PDF]

Europhysics News, 1990
openaire   +1 more source

MEMS deformable mirrors in astronomical adaptive optics

, 2010
We report on the development of microelectromechanical (MEMS) deformable mirrors designed for ground and space-based astronomical instruments using adaptive optics. These light-weight, low power deformable mirrors will have an active aperture of up to 25.
T. Bifano, P. Bierden, S. Cornelissen
core   +1 more source

P-REx: The Piston Reconstruction Experiment for infrared interferometry

, 2018
For sensitive infrared interferometry, it is crucial to control the differential piston evolution between the used telescopes. This is classically done by the use of a fringe tracker.
Velasco, S., Widmann, F., Pott, J.
core  

Edge-matched segmented mirrors for adaptive optics.

, 1994
The use of segmented mirrors in astronomy and adaptive optics is increasing as the ability to measure and control the position of the individual segments to a fraction of the wavelength of light becomes possible.
Gleckler, Anthony Duane
core  

Project to manufacture a transparent piston for an optical engine for heavy applications

, 2022
[ES] Los motores ópticos son herramientas muy interesantes para la investigación en el campo de los motores de combustión interna alternativos. La diferencia fundamental entre éstos y los motores de combustión estándar consiste principalmente en que permiten ver todo que ocurre dentro del cilindro gracias a que usan pistones transparentes que junto con
openaire   +2 more sources