Results 61 to 70 of about 28,711 (337)

Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces

Advanced Functional Materials, EarlyView.
A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai, Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Giuseppe Castaldi, Tie Jun Cui, Vincenzo Galdi   +6 more
wiley   +1 more source

The Deformable Mirror Demonstration Mission (DeMi) CubeSat: optomechanical design validation and laboratory calibration

, 2018
Coronagraphs on future space telescopes will require precise wavefront correction to detect Earth-like exoplanets near their host stars. High-actuator count microelectromechanical system (MEMS) deformable mirrors provide wavefront control with low size ...
Allan, Gregory, Barnes, Derek, Cahoy, Kerri L., Douglas, Ewan S., Egan, Mark, Furesz, Gabor, Grunwald, Warren, Gubner, Jennifer, Haughwout, Christian, Holden, Bobby G., Pereira, Paula do Vale, Stein, Abigail J.   +11 more
core   +1 more source

Learning Wavefront Coding for Extended Depth of Field Imaging [PDF]

, 2020
Depth of field is an important factor of imaging systems that highly affects the quality of the acquired spatial information. Extended depth of field (EDoF) imaging is a challenging ill-posed problem and has been extensively addressed in the literature ...
Akpinar, Ugur, Gotchev, Atanas, Meem, Monjurul, Menon, Rajesh, Sahin, Erdem   +4 more
core   +2 more sources

Progressive Insights into 3D Bioprinting for Corneal Tissue Restoration

Advanced Healthcare Materials, EarlyView.
This review explores the potential of 3D bioprinting to replicate the complex structure and function of the human cornea. It highlights key advances in bioink development, printing modalities, and in vivo performance, while addressing current challenges and emerging strategies. The review emphasizes bioprinting's promise to overcome donor shortages and
Ilayda Namli, Deepak Gupta, Yogendra Pratap Singh, Pallab Datta, Muhammad Rizwan, Mehmet Baykara, Ibrahim T. Ozbolat   +6 more
wiley   +1 more source

Spectrally resolved single-shot wavefront sensing of broadband high-harmonic sources

, 2017
Wavefront sensors are an important tool to characterize coherent beams of extreme ultraviolet radiation. However, conventional Hartmann-type sensors do not allow for independent wavefront characterization of different spectral components that may be ...
0000-0003-4753-3173, Eikema, K. S. E., Freisem, L., Jansen, G. S. M., Rudolf, Daniel, Witte, S.   +5 more
core   +2 more sources

Remote‐Controllable Immune‐Priming Spot Formation Via Nanocomplexed Hydrogel‐Assisted Histotripsy: Immunoasis

Advanced Materials, EarlyView.
A novel immunotherapeutic strategy combines injectable, adjuvant‐loaded hydrogels with externally controlled histotripsy to create immune‐priming sites within tumors. This approach generates millimeter‐sized immune‐activated lesions with flexible, patient‐tailored treatment scheduling, enabling precise immune activation through tumor ablation‐mediated ...
Sung Hoon Kim, Wonseok Choi, Yurim Kim, Hyeongmin Kim, Gu Won Jeong, Hyewon Park, Inchan Youn, Yoon Park, Sungmin Han, Young‐Min Kim   +9 more
wiley   +1 more source

Adaptive particle image velocimetry based on sharpness metrics

Journal of the European Optical Society-Rapid Publications, 2018
Background Optical distortions can significantly deteriorate the measurement accuracy in particle image velocimetry systems. Such distortions can occur at fluctuating phase boundaries during flow measurement and result from the accompanied refractive ...
M. Teich, J. Grottke, H. Radner, L. Büttner, J. W. Czarske   +4 more
doaj   +1 more source

Advanced holographic wavefront sensor [PDF]

SPIE Proceedings, 2017
Optical science and technologies require fast and precise measurements of wavefront curvature. Amount of wavefront measurement methods increased in the last few years. The important part of the modern wavefront sensors are holographic optical elements (HOE). This article shows a possibility of using HOE for generating Zernike aberration modes.
Alina Gorelaya, Mikhail Kovalev, Polina Malinina, Sergey Odinokov, Maksim Soloviev, Alexander Sevryugin, Vladimir Venediktov   +6 more
openaire   +1 more source

On-sky multi-wavelength phasing of segmented telescopes with the Zernike phase contrast sensor

, 2011
Future Extremely Large Telescopes will adopt segmented primary mirrors with several hundreds of segments. Cophasing of the segments together is essential to reach high wavefront quality.
Cavarroc, Chanan, Chanan, Dohlen, Dohlen, Dupuy, Gilmozzi, Gonte, Houairi, Lofdahl, Martinez, Mazzoleni, Montoya-Martínez, Nelson, Pinna, Polhemus, Surdej, Wilhelm, Yaitskova, Yaitskova, Zernike   +20 more
core   +3 more sources

Fluctuating Curvature and Actuation in 4D Printed Asymmetric Networks by Frontal Photopolymerization

Advanced Materials Interfaces, EarlyView.
Asymmetric polymer networks, fabricated by frontal photopolymerization (FPP), are shown to exhibit curvature oscillations associated with monomer‐solvent exchanges during development and drying. We introduce a theoretical model for such dynamic curvature fluctuations and demonstrate the fabrication of bistable switches and self‐propelled materials that
Muhammad Ghifari Ridwan, Zain Ahmad, Alessandra Vitale, João T. Cabral   +3 more
wiley   +1 more source