Results 51 to 60 of about 23,503 (294)

Electromagnetic deformable mirror fabricated using silicon micromachining and stress-resilient assembly

Advanced Optical Technologies
Introduction: This work presents a prototype electromagnetic actuation deformable mirror (DM) assembly with stress-resilient face sheet design.Methods: The DM face sheet design includes slender micromachined silicon pillars that are integrated with a ...
Wenkuan (Kevin) Man, Thomas Bifano
doaj   +1 more source

Exploring Microstructure–Physical Property–Corrosion Response Relationship in Intermetallic Compounds of Al‐Cu Bimetallic Interfaces

Advanced Engineering Materials, EarlyView.
Al‐Cu intermetallic compounds (IMCs) have a significant influence on the properties of Al‐Cu bimetallic interfaces formed in compound casting. This article provides a deeper understanding of microstructure, crystallography, thermal properties, hardness, and corrosion response of Al‐Cu IMCs with the goal of facilitating the optimization of the ...
Alireza Nazarahari, Tatiana Blank, Christian Hinte, Huseyin Can Ozdemir, Khemais Barienti, Christian Klose, Dermican Canadinc, Hans Jürgen Maier   +7 more
wiley   +1 more source

Wavefront correction with a ferrofluid deformable mirror: experimental results and recent developments

, 2008
We present the research status of a deformable mirror made of a magnetic liquid whose surface is actuated by a triangular array of small current carrying coils.
Borra, Ermanno F., Brousseau, Denis, Dery, Jean-Philippe, Faucher, Luc, Naderian, Azadeh, Parent, Jocelyn, Ritcey, Anna M., Seddiki, Omar, Thibaul, Simon, Vassallo, Julien   +9 more
core   +1 more source

1600 actuator tweeter mirror upgrade for the Palomar Adaptive Optics system (PALAO) [PDF]

, 2000
We discuss conceptual design issues for a 1600 actuator tweeter mirror/multiconjugate AO upgrade to the 349 actuator Palomar Adaptive Optics System (PALAO). Based upon a 42 X 42 actuator Photonex deformable mirror technology, developed by Xinetics, Inc.,
Bleau, C., Brack, G., Dekany, R., DuVarney, R., Ealey, M., Troy, M.   +5 more
core   +1 more source

Microstructural Evolution and Mechanical Performance of Plasma‐Assisted Hybrid Friction Stir Welded Dissimilar Aluminum–Copper Joints

Advanced Engineering Materials, EarlyView.
Plasma‐assisted hybrid friction stir welding of dissimilar AlCu joints employs localized plasma preheating to balance heat input and enhance plastic flow. The optimized process reduces axial force by up to 35%, refines the microstructure, and achieves ≈96% joint efficiency.
Deepak Kumar Yaduwanshi, Pankaj Shrivastava, Ganesh Chouhan, Velaphi Msomi   +3 more
wiley   +1 more source

An Efficient Method for Wavefront Aberration Correction Based on the RUN Optimizer

Photonics, 2023
The correction of wavefront aberrations in wavefront sensorless (WFS-less) adaptive optical (AO) systems requires control algorithms that can ensure rapid convergence while maintaining effective correction capabilities.
Huizhen Yang, Xiangdong Zang, Peng Chen, Xingliu Hu, Yongqiang Miao, Zhaojun Yan, Zhiguang Zhang   +6 more
doaj   +1 more source

Design and Prototyping of Topology‐Optimized, Additively Manufactured Lightweight Components for Space Robotic Systems: A Case Study

Advanced Engineering Materials, EarlyView.
The results demonstrate a simulation‐driven workflow that applies LSB topology optimization with additive manufacturing constraints to mission‐specific load cases, integrating European Cooperation for Space Standardization compliant verification and manufacturability to develop structurally efficient rover suspension components.
Stelios K. Georgantzinos, Grigorios Kostopoulos, Eleni Papadopoulou, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria N. Gkara, Chara Ch. Mitropoulou, Georgios Kazakis, Alin Munteanu, Jeremi Gancet, Nikos D. Lagaros   +11 more
wiley   +1 more source

Axial range of conjugate adaptive optics in two-photon microscopy

, 2015
We describe an adaptive optics technique for two-photon microscopy in which the deformable mirror used for aberration compensation is positioned in a plane conjugate to the plane of the aberration.
Bifano, Thomas, Mertz, Jerome, Paudel, Hari P., Taranto, John   +3 more
core   +1 more source

High-contrast imager for Complex Aperture Telescopes (HiCAT): 1. Testbed design [PDF]

, 2013
Searching for nearby habitable worlds with direct imaging and spectroscopy will require a telescope large enough to provide angular resolution and sensitivity to planets around a significant sample of stars.
Carlotti, Alexis, Choquet, Elodie, Elliot, Erin, Groff, Tyler, Kasdin, N. Jeremy, Macintosh, Bruce, Mawet, Dimitri, N'Diaye, Mamadou, Perrin, Marshall D., Pueyo, Laurent, Shaklan, Stuart, Sheckells, Matt, Soummer, Rémi, Wallace, J. Kent   +13 more
core   +4 more sources

Integrated structure and sensorless feedback control of unimorph piezoelectric deformable mirrors

Light: Advanced Manufacturing
Deformable mirrors are essential dynamic wavefront compensation. Among the various types of deformable mirrors with different actuation mechanisms, the unimorph piezoelectric deformable mirror (UPDM) offers distinct advantages owing to its compact size ...
Dapeng Tian, Jian Chen, Ping Jia
doaj   +1 more source