Results 111 to 120 of about 95,373 (320)

High‐Fidelity Computational Microscopy via Feature‐Domain Phase Retrieval

Advanced Science, EarlyView.
An innovative phase retrieval framework, termed FD‐PR, is uniquely established in the image's feature domain through the feature‐extracted, physical‐driven regression with interfaces for combining physics and image processing constraints. FD‐PR takes advantage of invariance components of an image against presences of model mismatch and uncertainty ...
Shuhe Zhang, An Pan, Hongbo Sun, Yidong Tan, Liangcai Cao   +4 more
wiley   +1 more source

In situ chamber for studying battery failure using high‐speed synchrotron radiography

Journal of Synchrotron Radiation, Volume 30, Issue 1, Page 192-199, January 2023., 2023
The developed test chamber, capable of high‐speed X‐ray imaging, was designed to perform robust in situ abuse tests on batteries in various configurations while providing a complete overview of the failure event with additional complementary measurement methods.The investigation of lithium‐ion battery failures is a major challenge for personnel and ...
Jonas Pfaff, Matilda Fransson, Ludovic Broche, Mark Buckwell, Donal P. Finegan, Stefan Moser, Sebastian Schopferer, Siegfried Nau, Paul R. Shearing, Alexander Rack   +9 more
wiley   +1 more source

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

, 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 present in a beam, which limits their applicability for intrinsically broadband high-harmonic generation
arxiv   +1 more source

Multi‐Wavelength Achromatic 3D Meta‐holography with Zoom Function

Advanced Science, EarlyView.
Due to the wavelength mismatch, chromatic aberrations are inevitable in multi‐wavelength meta‐holography. Moreover, since the meta‐hologram is difficult to be refreshed, zoom meta‐holography has not been reported to date. This study proposes a multi‐wavelength achromatic 3D meta‐holography with a zoom function, breaking through both the chromatic ...
Chao Liu, Yi Zheng, Di Wang, Qian Huang, Xiao‐Wei Li, Fan‐Chuan Lin, You‐Ran Zhao, Yi‐Wei Zheng, Xiao‐Ke Lu, Xin‐Ru Li, Xin‐Ru Zheng, Xin Xie, Kun Song, Zhen‐Fei Li, Wei Lu, Din Ping Tsai, Ruo‐Nan Ji, Qiong‐Hua Wang   +17 more
wiley   +1 more source

Data‐driven modeling and control of an X‐ray bimorph adaptive mirror

Journal of Synchrotron Radiation, Volume 30, Issue 1, Page 57-64, January 2023., 2023
A framework for data‐driven characterization of the nonlinear dynamics of a piezo‐bimorph adaptive X‐ray mirror has been developed. Rapid surface shape control and stability to within 2 nm RMS have been demonstrated.Adaptive X‐ray mirrors are being adopted on high‐coherent‐flux synchrotron and X‐ray free‐electron laser beamlines where dynamic phase ...
Gautam Gunjala, Antoine Wojdyla, Kenneth A. Goldberg, Zhi Qiao, Xianbo Shi, Lahsen Assoufid, Laura Waller   +6 more
wiley   +1 more source

Polarization‐Controlled Transmissive Plasmonic Color Filter Using a Dimer‐Aperture Array

Advanced Science, EarlyView.
An aluminum dimer aperture array plasmonic metasurface is proposed and fabricated to achieve efficient polarization‐color filtering with CMOS‐compatible materials. The structure's simultaneous polarization‐color filtering capability is shown using structural color generation, where color gamut coverage of 76% and extinction ratio over 20 is achieved ...
Shuhao Wu, Peter W.R. Connolly, Vincenzo Pusino, Gerald S. Buller, David R.S. Cumming   +4 more
wiley   +1 more source

Breaking Boundaries: A Universal Wavefront Reconstruction Approach for High-resolution Solar Imaging

The Astrophysical Journal Letters
This Letter proposes a universal wavefront reconstruction approach based on a coupled data set and neural network, aiming to overcome the limitations of current algorithms in terms of universality and wavefront sensing accuracy for variable imaging ...
Xinlan Ge, Licheng Zhu, Zeyu Gao, Shiqing Ma, Ao Li, Shuai Wang, Ping Yang   +6 more
doaj   +1 more source

Recovering pyramid WS gain in non-common path aberration correction mode via deformable lens

, 2017
It is by now well known that pyramid based wavefront sensors, once in closed loop, have the capability to improve more and more the gain as the reference natural star image size is getting smaller on the pyramid pin. Especially in extreme adaptive optics
Bergomi, M., Bonora, S., Chinellato, S., Favazza, P., Magrin, D., Quintavalla, M., Ragazzoni, R., Umbriaco, G.   +7 more
core   +1 more source

Achromatic 3D Multi‐Color Orbital Angular Momentum Holography

Advanced Science, EarlyView.
This work presents an achromatic 3D multicolor orbital angular momentum (OAM) holography based on spatial multiplexing. By integrating wavelength‐specific lens functions onto monochromatic Fourier OAM‐dependent holograms and high‐resolution spatial discretization and interleaving via two‐photon lithography (TPL), the approach addresses axial chromatic ...
Hang Su, Baoli Li, Yike Bai, Yiqi Ye, Yibo Dong, Xinyuan Fang   +5 more
wiley   +1 more source

Ophthalmic imaging in diabetic retinopathy: A review

Clinical &Experimental Ophthalmology, Volume 50, Issue 9, Page 1082-1096, December 2022., 2022
Abstract Retinal imaging has been a key tool in the diagnosis, evaluation, management and documentation of diabetic retinopathy (DR) and diabetic macular oedema (DMO) for many decades. Imaging technologies have rapidly evolved over the last few decades, yielding images with higher resolution and contrast with less time, effort and invasiveness.
Onnisa Nanegrungsunk, Direk Patikulsila, Srinivas R. Sadda   +2 more
wiley   +1 more source