Results 101 to 110 of about 24,150 (309)

From Complex Shaping to Mirror Finish: Additive Manufacturing of Aerospace‐grade Cf/SiC Space Optics

Advanced Science, EarlyView.
An integrated additive manufacturing route combines selective laser sintering, engineered interphases, and optimized silicon infiltration to fabricate complex Cf/SiC composites. The approach enables precise shaping, high mechanical performance, and excellent optical reflectivity, offering a scalable solution for advanced aerospace optics with both ...
Buhao Zhang, Li Wang, Xiao Chen, Yuquan Wei, Huisheng Tian, Zhengren Huang, Xuejian Liu, Zhongming Chen, Jie Yin   +8 more
wiley   +1 more source

Design considerations for wavefront sensing with self-referencing interferometers in adaptive optics systems

Journal of the European Optical Society-Rapid Publications
In this work, we show the design and implementation of wavefront sensing with a self-referencing interferometer (SRI). The SRI is developed to aid adaptive optics (AO) control, via deformable mirrors, in correcting wavefront error from atmospheric ...
MacGillivray Alexander C., Hristovski Ilija R., Jenne Matthias F., Reeves Andrew P., Mata Calvo Ramon, Holzman Jonathan F.   +5 more
doaj   +1 more source

Quantitative Stain Mapping in X‐Ray Virtual Histology

Advanced Science, EarlyView.
Virtual histology promises 3D tissue examination without physical sectioning, yet has lacked the tissue‐specificity of conventional pathology. This work demonstrates the first quantitative three‐dimensional stain mapping at histologically relevant resolution, separating contrast agent from tissue to reveal cellular features such as nuclei. The approach
Dominik John, David M. Paganin, Marie‐Christine Zdora, Lisa Marie Petzold, Patrick Ilg, Junan Chen, Sara Baggio, Johannes B. Thalhammer, Sami Wirtensohn, Julian Moosmann, Jörg U. Hammel, Felix Beckmann, Samantha J. Alloo, Jannis N. Ahlers, Madleen Busse, Julia Herzen, Kaye S. Morgan   +16 more
wiley   +1 more source

Wavefront error sensing for LDR [PDF]

Wavefront sensing is a significant aspect of the LDR control problem and requires attention at an early stage of the control system definition and design.
Glavich, T. A., Tubbs, Eldred F.
core   +1 more source

Multiple field-of-view MCAO for a Large Solar Telescope: LOST simulations

, 2010
In the framework of a 4m class Solar Telescope we studied the performance of the MCAO using the LOST simulation package. In particular, in this work we focus on two different methods to reduce the time delay error which is particularly critical in solar ...
Berrilli, Francesco, Del Moro, Dario, Piazzesi, Roberto, Stangalini, Marco   +3 more
core   +1 more source

Integrated Ultrasound Device for Precision Bladder Volume Monitoring via Acoustic Focusing and Machine Learning

Advanced Science, EarlyView.
We present a conformable wearable ultrasound patch for noninvasive bladder volume monitoring. A flexible PZT array combined with a concave acoustic lens concentrates acoustic energy and improves depth selectivity through the anterior pelvic wall.
Long Long Cao, Feng Wen Wang, Jingwei Xue, Fulei Liu, Ming Liang Jin   +4 more
wiley   +1 more source

Meta Shack–Hartmann wavefront sensor with large sampling density and large angular field of view: phase imaging of complex objects

Light: Science & Applications
Shack–Hartmann wavefront sensors measure the local slopes of an incoming wavefront based on the displacement of focal spots created by a lenslet array, serving as key components for adaptive optics for astronomical and biomedical imaging.
Gi-Hyun Go, Dong-gu Lee, Jaeyeon Oh, Gookho Song, Doeon Lee, Mooseok Jang   +5 more
doaj   +1 more source

The Robo-AO-2 facility for rapid visible/near-infrared AO imaging and the demonstration of hybrid techniques [PDF]

, 2018
We are building a next-generation laser adaptive optics system, Robo-AO-2, for the UH 2.2-m telescope that will deliver robotic, diffraction-limited observations at visible and near-infrared wavelengths in unprecedented numbers.
Baranec, Christoph, Chun, Mark, Connelley, Michael, de Pater, Imke, Dekany, Richard, Griffiths, Richard, Guyon, Olivier, Hall, Donald, Hammel, Heidi, Hodapp, Klaus, Huber, Daniel, Kasliwal, Mansi, Kissler-Patig, Markus, Kuchner, Marc, Lau, Ryan, Law, Nicholas M., Liu, Michael, Magnier, Eugene, Meech, Karen, Moore, Anna, Ofek, Eran, Riddle, Reed, Simon, Amy, Takamiya, Marianne, van Dam, Marcos A., Wong, Mike   +25 more
core   +1 more source

Active Control of Laser Wavefronts in Atom Interferometers

, 2017
Wavefront aberrations are identified as a major limitation in quantum sensors. They are today the main contribution in the uncertainty budget of best cold atom interferometers based on two-photon laser beam splitters, and constitute an important limit ...
Langlois, Mehdi, Merlet, Sébastien, Santos, Franck Pereira dos, Trimeche, Azer   +3 more
core   +2 more sources

Broadband Achromatic Programmable Electromagnetic Camouflage via Fluidic‐Accessible Metasurface

Advanced Science, EarlyView.
A fluidic access metasurface enables dynamic, broadband electromagnetic illusions. By physically reconstructing conductive patterns with liquid metal, the metasurface achieves real‐time, pixel‐level control over phase dispersion. This allows for the programmable generation of arbitrary strong scattering point arrays, effectively deceiving high ...
Shipeng Liu, Jiahao Zhang, Jiale Wang, Zeyao Chen, Zhaotong Yu, Jinhong Luo, Jiabao Luo, Rujia Cao, Shuxi Gong, Qingxin Guo, Ping Li, Rujiang Li, Ke Chen, Yongtao Jia, Ying Liu   +14 more
wiley   +1 more source