Results 51 to 60 of about 675,553 (330)

Surface Shape Distortion Online Measurement Method for Compact Laser Cavities Based on Phase Measuring Deflectometry

open access: yesPhotonics, 2022
Conventional phase measuring deflectometry (PMD) takes up a large measurement space and is not suitable for compact online measurement, as the liquid crystal display (LCD) has to be placed in parallel with the mirror under test.
Yongchen Zhuang   +5 more
doaj   +1 more source

Phase control of a longitudinal momentum entangled photon state by a deformable membrane mirror

open access: yes, 2009
We propose a paradigmatic demonstration of the potentialities of a deformable mirror for closed-loop control of a two-photon momentum-entangled state, subject to phase fluctuations.
Abouraddy   +29 more
core   +1 more source

Loss of Stat3 in Prx1+ Progenitors Impairs Molar Root Development

open access: yesAdvanced Biology, EarlyView.
Stat3 critically regulates mandibular first molar and alveolar bone morphogenesis. Conditional ablation of Stat3 disrupts the osteogenic capacity of Prx1+ mesenchymal progenitors, as evidenced across in vivo and in vitro models. Abstract Signal Transducer and Activator of Transcription 3 (Stat3) acts as a central transcriptional modulator coordinating ...
Xin Feng   +10 more
wiley   +1 more source

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

open access: yesAdvanced 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

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

open access: yesPhotonics, 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   +6 more
doaj   +1 more source

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

open access: yes, 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.   +9 more
core   +1 more source

Influence of Temperature on Scratch and Wear Properties of Technical Thermoplastics: Implications for Material Selection

open access: yesAdvanced Engineering Materials, EarlyView.
The share of technical thermoplastics is expected to grow further in the e‐mobility segment. In this study, a detailed temperature‐based tribological characterization of technical thermoplastics is performed. The tribological properties are discussed in terms of the dynamic mechanical properties of polymers at different ambient temperatures. A proof of
Harsha Raghuram   +2 more
wiley   +1 more source

Integrated Laboratory Demonstrations of Multi-Object Adaptive Optics on a Simulated 10-Meter Telescope at Visible Wavelengths [PDF]

open access: yes, 2009
One important frontier for astronomical adaptive optics (AO) involves methods such as Multi-Object AO and Multi-Conjugate AO that have the potential to give a significantly larger field of view than conventional AO techniques.
Ammons, S. Mark   +6 more
core   +1 more source

Additive Manufacturing of Gradient Stiffness Honeycombs Using Thermoplastic Polyurethane Composite Material Variations

open access: yesAdvanced Engineering Materials, EarlyView.
By combining porous, solid, and carbon fiber‐reinforced thermoplastic polyurethane within a single 3D printed honeycomb structure, this current work achieved precise control over spatial stiffness while ensuring strong interlayer adhesion. The findings demonstrate enhanced energy absorption and densification strain, outperforming traditional uniform ...
Savvas Koltsakidis   +2 more
wiley   +1 more source

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

open access: yes, 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.   +5 more
core   +1 more source

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