Results 21 to 30 of about 9,355,325 (300)

Analysis of design for Hartmann-Shack measurements under usage of Fourier-iteration and Zernike approximation wavefront reconstruction methods

, 2022
Paper 97171P, 6 S.The measurement of a wavefront is a powerful tool for characterizing optical systems. The most commonly used wavefront measurement technique is the method of local-light aberrometry.
Hartmann, Peter, Baselt, Tobias, Kabardiadi, Alexander, Greiner, Andreas, Aßmann, Heiko   +4 more
core   +1 more source

Validating advanced wavefront control techniques on the SCExAO testbed/instrument [PDF]

, 2020
The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) serves both a science instrument in operation, and a prototyping platform for integrating and validating advanced wavefront control techniques.
Norris, B., Groff, T., Sahoo, Ananya, Lozi, Julien, Bos, Steven, Miller, Kelsey L., Lozi, J., Males, Jared R., Sevin, A., Currie, T., Mazin, B.A., Martinod, Marc Antoine, Lopez, Coline, Vievard, S., Snik, Frans, Groff, Tyler, Mazin, Benjamin, Ndiaye, Mamadou, Vievard, Sébastien, Belikov, Ruslan, Lopez, C., Males, J., Kotani, T., Pluzhnyk, Eugene, Ndiaye, M., Kawahara, Hajime, Guyon, O., Sahoo, A., Martinache, F., Skaf, N., Martinod, Marc-Antoine, Deo, V., Bendek, E., Tamura, M., Wong, Alison, Ltaief, H., Martinache, Frantz, Pluzhnyk, E., Sevin, Arnaud, Bendek, Eduardo, Norris, Barnaby, Tamura, Motohide, Bos, Steven P., Fitzgerald, Michael, Currie, Thayne, Miller, K., Jovanovic, Nemanja, Miller, Kelsey, Gratadour, Damien, Kudo, Tomoyuki, Belikov, R., Kotani, Takayuki, Kudo, T., Males, Jared, Groff, Tyler D., Martinod, M.-A., Ltaief, Hatem, Deo, Vincent, Fitzgerald, M., Kawahara, H., Snik, F., Mazin, Benjamin A., Jovanovic, N., Gratadour, D., Skaf, Nour, Bos, S., Wong, A., Guyon, Olivier   +67 more
core   +1 more source

Depth-Resolved Wavefront Aberrations using a Coherence-Gated Shack-Hartmann Wavefront Sensor [PDF]

, 2010
In the present paper we investigate the possibility of narrowing the depth range of a physical Shack - Hartmann (SH) wavefront sensor (WFS) by using coherence gating.
Tuohy, Simon, Podoleanu, Adrian G.H.
core   +1 more source

Wavefront sensing for objective assessment of vision therapy efficacy: Preliminary results [PDF]

EPJ Web of Conferences, 2023
The aim of this study was to use wavefront sensing to objectively evaluate the effects of vision therapy in subjects with insufficiency (AI) and infacility of accommodation (AINF). Aberrometry was performed with a Shack-Hartmann wavefront aberrometer for
Gomes Jessica, Sapkota Kishor, Franco Sandra   +2 more
doaj   +1 more source

Coherent Wave Control in Complex Media with Arbitrary Wavefronts [PDF]

Physical Review Letters, 2021
13 pages including 4 figures + 7 pages Supplemental ...
Philipp del Hougne, K. Brahima Yeo, Philippe Besnier, Matthieu Davy   +3 more
openaire   +5 more sources

MEMS phase former kit for high-resolution wavefront control

, 2022
S.148-161The MEMS Phase Former Kit developed by the Fraunhofer IPMS is a complete Spatial Light Modulator system based on a piston-type Micro Mirror Array (MMA) for the use in high-resolution, high-speed optical phase control. It has been designed for an
Schenk, H., Gehner, A., Elgner, A., Wildenhain, M., Neumann, H.   +4 more
core   +1 more source

Control Electromagnetic Waves Based on Multi-Layered Transparent Metasurface

Frontiers in Physics, 2019
Metasurface was presented to be the two-dimensional analogs of metamaterials that regulate the beam by adjusting the phase and amplitude of the wavefront.
Zhichao Sun, Mengyao Yan, Tungamirai Eric Mupona, Bijun Xu   +3 more
doaj   +1 more source

Disturbance Modelling for Minimum Variance Control in Adaptive Optics Systems Using Wavefront Sensor Sampled-Data

Sensors, 2021
Modern large telescopes are built based on the effectiveness of adaptive optics systems in mitigating the detrimental effects of wavefront distortions on astronomical images.
María Coronel, Rodrigo Carvajal, Pedro Escárate, Juan C. Agüero   +3 more
doaj   +1 more source

MEMS Deformable Mirrors for Space-Based High-Contrast Imaging

Micromachines, 2019
Micro-Electro-Mechanical Systems (MEMS) Deformable Mirrors (DMs) enable precise wavefront control for optical systems. This technology can be used to meet the extreme wavefront control requirements for high contrast imaging of exoplanets with coronagraph
Rachel E. Morgan, Ewan S. Douglas, Gregory W. Allan, Paul Bierden, Supriya Chakrabarti, Timothy Cook, Mark Egan, Gabor Furesz, Jennifer N. Gubner, Tyler D. Groff, Christian A. Haughwout, Bobby G. Holden, Christopher B. Mendillo, Mireille Ouellet, Paula do Vale Pereira, Abigail J. Stein, Simon Thibault, Xingtao Wu, Yeyuan Xin, Kerri L. Cahoy   +19 more
doaj   +1 more source

Wavefront Control of 2D Curved Coding Metasurfaces Based on Extended Array Theory

IEEE Access, 2019
We extend the array theory to design 2D curved coding metasurfaces in order to achieve arbitrary wavefront control. The extended array theory establishes the relationship between wavefront and curved-surface, which provides a simple and effective method ...
Yang Zhou, Jianliang Xie, Haiyan Chen, Li Zhang, Yao Yan, Fengxia Li, Linbo Zhang, Peiheng Zhou, Longjiang Deng   +8 more
doaj   +1 more source