Results 1 to 10 of about 1,750,058 (245)

Aberration Theoretical Principle of Broadband Multilayer Refractive–Diffractive Optical Elements by Polychromatic Integral Aberration Method

Photonics
Multilayer diffractive optical elements (MLDOEs), which have broadband imaging performance, are widely used in lightweight and compact optical systems on the surface of the refractive lenses forming refractive–diffractive lenses.
Ying Yang, Chongxing Liu, Wanting Yang, Yumin Wei, Mengyuan Liu, Bo Dong, Changxi Xue   +6 more
doaj   +1 more source

Ensemble Diffraction Microscopy: An Imaging Technique That Allows High-Resolution Diffraction Imaging Using Both Totally and Partially Coherent Sources

IEEE Photonics Journal, 2023
Coherent diffraction microscopy (CDM) is a potential approach to image micromaterials at atomic resolution without crystals. Due to the lack of high-angle scattering, the achieved resolution is limited to several nanometers. Small-angle scattering allows
Ning-Jung Chen, Huai-Yu Cao, Jhih-Min Lin, Yu-Shan Huang, Yi-Wei Tsai, Chien-Chun Chen   +5 more
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Computer-free computational imaging: optical computing for seeing through random media

Light: Science & Applications, 2022
Diffractive Deep Neural Network enables computer-free, all-optical “computational imaging” for seeing through unknown random diffusers at the speed of light.
Yunzhe Li, Lei Tian
doaj   +1 more source

Optimized Phase-Retrieval Technique for Coherent Diffractive Microscopy: Guided Ptychography Iterative Engine

IEEE Photonics Journal, 2022
We have developed a guided ptychography iterative engine (gPIE) algorithm that applies the concept of optimization to the conventional ePIE (extended ptychography iterative engine) approach.
Cheng-Wei Hsu, Ping Lu, Pei-Chi Huang, Jia-Ru Yu, Chi Chen, Shang-Da Yang, Chien-Chun Chen   +6 more
doaj   +1 more source

Design, Analysis, and Manufacturing of Diffractive Achromatic Optical Systems

Micromachines
The increasing resolution requirements of imaging optical systems must be satisfied by expanding the aperture of the optical system according to Rayleigh’s criterion, and larger apertures of conventional refractive/reflective optics place a greater ...
Yidi Zheng, Junfeng Du, Boping Lei, Jiang Bian, Lihua Wang, Bin Fan   +5 more
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Hollow Electron Ptychographic Diffractive Imaging [PDF]

Physical Review Letters, 2018
We report a method for quantitative phase recovery and simultaneous electron energy loss spectroscopy analysis using ptychographic reconstruction of a data set of "hollow" diffraction patterns. This has the potential for recovering both structural and chemical information at atomic resolution with a new generation of detectors.
Song, B, Ding, Z, Allen, C, Sawada, H, Zhang, F, Pan, X, Warner, J, Kirkland, A, Wang, P   +8 more
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Generation of Circularly Polarized Quasi-Non-Diffractive Vortex Wave via a Microwave Holographic Metasurface Integrated with a Monopole

Applied Sciences, 2021
In this paper, a novel method for generating a circularly polarized (CP) quasi-non-diffractive vortex wave carrying orbital angular momentum (OAM), based on the microwave holographic metasurface integrated with a monopole, is proposed. This method is the
Chen Zhang, Li Deng, Ling Wang, Xue Chen, Shufang Li   +4 more
doaj   +1 more source

The linac coherent light source single particle imaging road map

Structural Dynamics, 2015
Intense femtosecond x-ray pulses from free-electron laser sources allow the imaging of individual particles in a single shot. Early experiments at the Linac Coherent Light Source (LCLS) have led to rapid progress in the field and, so ...
A. Aquila, A. Barty, C. Bostedt, S. Boutet, G. Carini, D. dePonte, P. Drell, S. Doniach, K. H. Downing, T. Earnest, H. Elmlund, V. Elser, M. Gühr, J. Hajdu, J. Hastings, S. P. Hau-Riege, Z. Huang, E. E. Lattman, F. R. N. C. Maia, S. Marchesini, A. Ourmazd, C. Pellegrini, R. Santra, I. Schlichting, C. Schroer, J. C. H. Spence, I. A. Vartanyants, S. Wakatsuki, W. I. Weis, G. J. Williams   +29 more
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Broadband unidirectional visible imaging using wafer-scale nano-fabrication of multi-layer diffractive optical processors

Light: Science & Applications
We present a broadband and polarization-insensitive unidirectional imager that operates at the visible part of the spectrum, where image formation occurs in one direction, while in the opposite direction, it is blocked.
Che-Yung Shen, Paolo Batoni, Xilin Yang, Jingxi Li, Kun Liao, Jared Stack, Jeff Gardner, Kevin Welch, Aydogan Ozcan   +8 more
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On the diffraction limit for lensless imaging

Journal of Research of the National Institute of Standards and Technology, 1999
The diffraction limit for lensless imaging, defined as the sharpest possible point image obtainable with a pinhole aperture, is analyzed and compared to the corresponding limit for imaging with lenses by means of theoretical considerations and numerical computations using the Fresnel-Lommel diffraction theory for circular apertures.
openaire   +1 more source