Results 81 to 90 of about 21,299 (296)

CubeSat deformable mirror demonstration [PDF]

SPIE Proceedings, 2012
The goal of the CubeSat Deformable Mirror Demonstration (DeMi) is to characterize the performance of a small deformable mirror over a year in low-Earth orbit. Small form factor deformable mirrors are a key technology needed to correct optical system aberrations in high contrast, high dynamic range space telescope applications such as space-based ...
Cahoy, Kerri, Cheng, Kezi, Jamil, Sara, Marinan, Anne D., Kerr, Caitlin E.   +4 more
openaire   +2 more sources

Affecting the Properties of Copper–Graphene Electroconductive Composite by Severe Plastic Deformation

Advanced Engineering Materials, EarlyView.
Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich, Lenka Kunčická, Pavel Czernek, Zifan Wang   +3 more
wiley   +1 more source

High-contrast imaging at small separation: impact of the optical configuration of two deformable mirrors on dark holes [PDF]

, 2017
The direct detection and characterization of exoplanets will be a major scientific driver over the next decade, involving the development of very large telescopes and requires high-contrast imaging close to the optical axis.
Abe, L., Baudoz, P., Beaulieu, M., Gouvret, C., Martinez, P., Vakili, F.   +5 more
core   +2 more sources

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source

Fast Linearized Coronagraph Optimizer (FALCO) IV. Coronagraph design survey for obstructed and segmented apertures [PDF]

, 2018
Coronagraph instruments on future space telescopes will enable the direct detection and characterization of Earth-like exoplanets around Sun-like stars for the first time.
Bolcar, Coker, Give’on, Jewell, Krist, Krist, Noecker, Pueyo, Riggs, Ruane, Ruane, Ruane, Sidick, Zhang   +13 more
core   +3 more sources

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Optical characterization of the PALM-3000 3388-actuator deformable mirror [PDF]

, 2010
We describe the lab characterization of the new 3,388-actuator deformable mirror (DM3388) produced by Xinetics, Inc. for the PALM-3000 adaptive optics (AO) system1 under development by Jet Propulsion Laboratory and Caltech Optical Observatories.
Bouchez, Antonin H., Burruss, Rick S., Dekany, Richard G., Guiwits, Stephen R., Roberts, Jennifer, Troy, Mitchell   +5 more
core  

MOEMS deformable mirror testing in cryo for future optical instrumentation

, 2017
MOEMS Deformable Mirrors (DM) are key components for next generation instruments with innovative adaptive optics systems, in existing telescopes and in the future ELTs.
Barette, Rudy, Grassi, Emmanuel, Helmbrecht, Michael, Lanzoni, Patrick, Marchis, Franck, Teichman, Alex, Vors, Patrick, Zamkotsian, Frederic   +7 more
core   +1 more source

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source

Programmable unitary spatial modes manipulation

, 2010
Free space propagation and conventional optical systems such as lenses and mirrors all perform spatial unitary transforms. However, the subset of transforms available through these conventional systems is limited in scope.
Bagnoud, Borevich, Boris Hage, Delaubert, Fade, Hans-A. Bachor, Hsieh, Jean-François Morizur, Jiri Janousek, Kirkpatrick, Lachlan Nicholls, Leach, Magnus Hsu, Nicolas Treps, Potsaid, Preumont, Pu Jian, Roorda, Seiji Armstrong, Shirai, Tay, Török, Warwick Bowen, Wyrowski   +23 more
core   +1 more source