Results 41 to 50 of about 1,567 (171)

Reversible compression of an optical piston through Kramers dynamics

open access: yes, 2015
9 pages, 9 ...
Schnoering, Gabriel, Genet, Cyriaque
openaire   +2 more sources

The atmospheric piston simulator as an integral part of the calibration unit of LINC - NIRVANA

open access: yes, 2010
The atmospheric piston simulator is an integral part of the calibration unit of LINC-NIRVANA, the Fizeau interferometric imager for the Large Binocular Telescope.
R. Follert   +7 more
core   +1 more source

Phase transitions of photon fluid flows driven by a virtual all-optical piston

open access: yes, 2020
The piston problem, i.e. the dynamics in a uniform gas at rest under the action of a moving piston is fundamental problem of physics and a canonical case study in shock wave physics.
Abdelkrim Bendahmane (17503791)   +5 more
core   +1 more source

Zernike Piston Statistics in Turbulent Multi-Aperture Optical Systems

open access: yes, 2020
There is currently a lack of research into how the atmosphere effects Zernike piston. This Zernike piston is a coefficient related to the average phase delay of a wave.
Garretson, Joshua J.
core  

Optical calibration and testing of the E-ELT M4 adaptive mirror

open access: yes, 2012
Innovative optical interferometry test setups and control software techniques have been proposed for the E-ELT M4 adaptive optics mirror. The system is composed of three sub-systems: a CGH-based optical test tower, delivering a 1.5-m collimated beam, for
PARIANI, GIORGIO   +25 more
core   +1 more source

Zernike generation with MEMS deformadle mirror actuated by electrostatic piston array [PDF]

open access: yes, 2018
2018 IEEE Micro Electro Mechanical Systems (MEMS), 21-25 Jan. 2018.We report a low-voltage and large-displacement electrostatic deformable mirror for in vivo retinal imaging by adaptive-optics optical coherence tomography.
Toshiyuki Tsuchiya   +7 more
core   +1 more source

Focal-plane wavefront sensing for active optics in the VST based on an analytical optical aberration model [PDF]

open access: yes, 2016
We study a novel focal plane wavefront sensing and active optics control scheme at the VST on Cerro Paranal, an f/5.5 survey telescope with a 1x1 degree field of view and a 2.6m primary mirror.
Noethe, L.   +11 more
core   +1 more source

APPLICABILITY STUDY OF THE FIBER-OPTIC GYRO IN PISTON ENGINES DIAGNOSING PROCESS

open access: yesAgricultural Engineering, 2014
The Polish Naval Academy has been involved in marine reciprocating combustion engines indication tests for many years. Results of researches aiming to diagnostic using of measurement of engine crankshaft unsteady angular speed are presented in the paper.
Tomasz Lus   +2 more
openaire   +2 more sources

The Riemann problem in nonlinear fiber optics

open access: yes, 2022
We investigate theoretically and experimentally the Riemann problem in nonlinear fiber optics, i.e. how a pulse with stepwise change in power or/and chirp evolve along an optical fiber in the nonlinear regime.
S. Trillo   +5 more
core  

Study of film formation in EHD contacts using a novel method based on electrical capacitance

open access: yes, 2011
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.The elastohydrodynamic lubrication regime (EHD) is found in many machine elements, such as rolling element bearings, gears, cam/tappet, where a combination ...
Furtuna, Marian Dumitru
core  

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