Download or read book Coherent Diffractive Imaging Using Randomly Coded Masks written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We experimentally demonstrate an extension to coherent diffractive imaging that encodes additional information through the use of a series of randomly coded masks, removing the need for typical object-domain constraints while guaranteeing a unique solution to the phase retrieval problem. Phase retrieval is performed using a numerical convex relaxation routine known as "PhaseCut," an iterative algorithm known for its stability and for its ability to find the global solution, which can be found efficiently and which is robust to noise. As a result, the experiment is performed using a laser diode at 532.2 nm, enabling rapid prototyping for future X-ray synchrotron and even free electron laser experiments.
Download or read book Coherent Diffractive Imaging Using Table top Sources written by Michal Odstrčil and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Super Resolved Imaging written by Zeev Zalevsky and published by Springer Science & Business Media. This book was released on 2011-09-08 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this brief we review several approaches that provide super resolved imaging, overcoming the geometrical limitation of the detector as well as the diffraction effects set by the F number of the imaging lens. In order to obtain the super resolved enhancement, we use spatially non-uniform and/or random transmission structures to encode the image or the aperture planes. The desired resolution enhanced images are obtained by post-processing decoding of the captured data.
Download or read book Coded Optical Imaging written by Jinyang Liang and published by Springer Nature. This book was released on with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coherent Diffractive Imaging Using Curved Beam Illumination written by H. N. Chapman and published by . This book was released on 2005 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The potential of coherent diffractive imaging has in recent years become well recognized. In this technique an essentially parallel beam of coherent x-rays illuminates a support region containing an unknown sample. Outside that region the wavefield is known--typically the sample is isolated so that outside the support there is no scattering. When the diffraction pattern is measured with sufficient signal to noise ratio an iterative technique can be used to solve for the transmission function of the sample. The technique offers extremely high resolution reconstructions of a sample.
Download or read book Smart Imaging Systems written by Bahram Javidi and published by SPIE Press. This book was released on 2001 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent advances in image sensing and processing systems, image recognition, 3D imaging and processing, ultrafast optical networks for image communication, and multidimensional information security systems. Eleven chapters by international experts provide practical and theoretical insights. Useful for students, researchers, and technology users in IT, image processing, and optics.
Download or read book Coherent Diffractive Imaging with Enhanced Contrast Mechanisms written by Arjun Rana and published by . This book was released on 2021 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coherent diffractive imaging (CDI) is an imaging technique which uses reconstructionalgorithms in place of lenses to avoid aberration, which becomes vital in the x-ray regime. Over the last two decades, CDI has served as an invaluable tool to reveal the structure and chemical composition of a wide range of material and biological systems, providing insight across many disciplines. As part of the modern scientific frontier, CDI continues to evolve as an integral tool for the investigation of increasingly complex systems, while pushing the spatiotemporal limit. This work contains three studies which demonstrate extended capabilities of CDI through the utilization of fundamental light-matter interactions in tandem with advanced algorithms. First, the development of a novel broadband reconstruction algorithm called "Spectrum Probe and Image Reconstruction" (SPIRE) is presented in the context of attosecond imaging. An understanding of incoherent scattering permits the development of SPIRE which is shown to outperform other broadband reconstruction algorithms through the use of novel constraints. SPIRE is tested with a set of numerical simulations and a tabletop experiment with a white LED source. The results demonstrate the viability of CDI with broadband illumination and on ultrafast time scales. Second, x-ray magnetic circular dichroism (XMCD) is used to probe the magnetization of a geometrically confined ferromagnet on the nanoscale. A novel vector tomography algorithm titled "Vector REal Space Iterative Reconstruction Engine (Vector RESIRE)" is used to directly reconstruct the 3D magnetization vector field in addition to the sample structure, without any prior assumptions. Topological analysis of the reconstruction result reveals a network of non-trivial magnetic point defects known as hedgehogs. The 3D spatial distribution of hedgehogs serve to validate the current theory of hedgehog confinement and potential of metalattices in spintronics applications. In the appendix, polarization-dependent imaging contrast (PIC) is used to map the orientation of the crystal c-axis of calcium carbonate in a coral skeleton. Hierarchical clustering is applied to 4D scanning transmission electron microscope (STEM) data from the same sample to gain additional information about the crystal grain structure. The PIC and 4D STEM results are correlated to elucidate growth and nucleation conditions for coral.
Download or read book Elements of Modern X ray Physics written by Jens Als-Nielsen and published by John Wiley & Sons. This book was released on 2011-04-20 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eagerly awaited, this second edition of a best-selling text comprehensively describes from a modern perspective the basics of x-ray physics as well as the completely new opportunities offered by synchrotron radiation. Written by internationally acclaimed authors, the style of the book is to develop the basic physical principles without obscuring them with excessive mathematics. The second edition differs substantially from the first edition, with over 30% new material, including: A new chapter on non-crystalline diffraction - designed to appeal to the large community who study the structure of liquids, glasses, and most importantly polymers and bio-molecules A new chapter on x-ray imaging - developed in close cooperation with many of the leading experts in the field Two new chapters covering non-crystalline diffraction and imaging Many important changes to various sections in the book have been made with a view to improving the exposition Four-colour representation throughout the text to clarify key concepts Extensive problems after each chapter There is also supplementary book material for this title available online (http://booksupport.wiley.com). Praise for the previous edition: "The publication of Jens Als-Nielsen and Des McMorrow's Elements of Modern X-ray Physics is a defining moment in the field of synchrotron radiation... a welcome addition to the bookshelves of synchrotron–radiation professionals and students alike.... The text is now my personal choice for teaching x-ray physics...." —Physics Today, 2002
Download or read book Applied Optics written by and published by . This book was released on 1998 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to IEEE Publications written by Institute of Electrical and Electronics Engineers and published by . This book was released on 1997 with total page 1462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues for 1973- cover the entire IEEE technical literature.
Download or read book Physics Briefs written by and published by . This book was released on 1992 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 2022 Applied Mathematics and Statistics Editor s Pick written by Charles K. Chui and published by Frontiers Media SA. This book was released on 2023-04-06 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Optical Society of America written by Optical Society of America and published by . This book was released on 1981 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reconfigurable Array Interconnection by Photorefractive Volume Holography written by Joseph Earl Ford and published by . This book was released on 1992 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fourier Ptychographic Imaging written by Guoan Zheng and published by Morgan & Claypool Publishers. This book was released on 2016-06-30 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book demonstrates the concept of Fourier ptychography, a new imaging technique that bypasses the resolution limit of the employed optics. In particular, it transforms the general challenge of high-throughput, high-resolution imaging from one that is coupled to the physical limitations of the optics to one that is solvable through computation. Demonstrated in a tutorial form and providing many MATLAB® simulation examples for the reader, it also discusses the experimental implementation and recent developments of Fourier ptychography. This book will be of interest to researchers and engineers learning simulation techniques for Fourier optics and the Fourier ptychography concept.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1996 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hadamard Transform Optics written by Martin Harwit and published by . This book was released on 1979 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
