Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Characterization Of Instrument Effects In Imaging And Non Imaging Polarimeters
Download Characterization Of Instrument Effects In Imaging And Non Imaging Polarimeters full books in PDF, epub, and Kindle. Read online Characterization Of Instrument Effects In Imaging And Non Imaging Polarimeters ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Characterization of Instrument Effects in Imaging and Non-Imaging Polarimeters by :
Download or read book Characterization of Instrument Effects in Imaging and Non-Imaging Polarimeters written by and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this one-year effort was to identify and investigate some important effects that the optical systems have on the performance of imaging and non-imaging polarimeters. During our period of performance we concentrated on two primary areas; 1) Characterization of the effects of systematic errors in the polarization optics of non-imaging polarimeters through measurements and comparing these results to previous theory; and 2) Investigation of the effects of focal plane array nonuniformity on the performance of imaging polarimeters. In the first area, we have made some of the only available measurements that demonstrate the theoretical predictions made over the past several years. We have build a manually operated polarimeter testbed system, and are in the process of building a fully automated polarimeter testbed system. In the second area, we have modeled a rotating-retarder polarimeter operating with a focal plane array exhibiting response nonuniformity. We have found that gain and bias nonuniformity affect the imagery differently, and can be mitigated using NUC techniques that have been developed for conventional IR imagery.
Book Synopsis Calibration and Compensation of Instrumental Errors in Imaging Polarimeters by :
Download or read book Calibration and Compensation of Instrumental Errors in Imaging Polarimeters written by and published by . This book was released on 2007 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The measurement and exploitation of polarization information has become a high priority in a variety of Air Force and DoD remote sensing missions. Polarization provides a useful dimension of information that helps to characterize shape and surface characteristics of interesting targets in optical imagery from the UV through the LWIR and beyond. There are a number of ongoing efforts that are developing specific instruments to quantitatively measure polarization information across a scene. We have discovered that polarization is important, but it can also be quite difficult to measure accurately. Optical systems designed to respond to polarization information are usually more complex than those that respond to spectral information. In addition, most polarimeters require linear combinations of multiple looks at a single pixel in order to infer the polarization parameters. In contrast, most spectral imagers (certain Fourier transform devices excepted) can form the spectrum at a pixel in a single integration time without comparing measurements from different sensors. Because polarization imagers are more complex, uncalibrated instrumental errors can be even more damaging to the quality of the final imagery. This research project was focused on understanding the instrumental effects on imaging polarimeters and compensating for them in the final imagery.
Book Synopsis Imaging Polarimetry with Polarization-sensitive Focal Plane Arrays by : Dmitry V. Vorobiev
Download or read book Imaging Polarimetry with Polarization-sensitive Focal Plane Arrays written by Dmitry V. Vorobiev and published by . This book was released on 2017 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Polarization is an intrinsic property of light, like frequency or coherence. Humans have long benefited from our ability to distinguish light of different frequency based on its color. However, our eyes are not sensitive to the polarization of light. Devices to measure polarization are relatively rare and expertise in polarimetry even more so. Polarization sensors based on micropolarizer arrays appear to be the first devices capable of bringing polarimetric capability to a wide range of applications. Whereas previous polarimeters were built to perform very specific measurements, the same micropolarizer-based camera can be used on a telescope, a microscope, or with a conventional camera lens. In this work, I investigate the operating principles of micropolarizer arrays using high resolution 3D simulations and describe several strategies to fabricate and characterize micropolarizer-based imaging polarimeters. Furthermore, I show how to incorporate the device characterization into a calibrated demodulation procedure to extract polarimetric quantities from the raw pixel intensities. As part of this effort, I show how the measured sensor properties, like pixel throughput and contrast ratio, can be used to construct a software model to produce synthetic observations of various scenes. These synthetic data are a powerful tool to study the many effects which can give rise to systematic and/or random errors during the data analysis process. Finally, I present the polarimetry performed on several astronomical sources using the RIT Polarization Imaging Camera and compare my results to previous measurements made with conventional polarimeters. Using the current calibration of the RIT Polarization Imaging Camera, I was able to achieve a polarimetric accuracy of ~0.3% in images of extended objects and unresolved sources."--Abstract.
Book Synopsis Stellar Polarimetry by : David Clarke
Download or read book Stellar Polarimetry written by David Clarke and published by John Wiley & Sons. This book was released on 2009-10-30 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by an experienced teacher and author, this must-have source for work with polarimetric equipment and polarimetry in astronomy conveys the knowledge of the technology and techniques needed to measure and interpret polarizations. As such, this monograph offers a brief introduction and refresher, while also covering in detail statistics and data treatment as well as telescope optics. For astronomers, physicists and those working in the optical industry.
Book Synopsis X-ray Polarimetry by : Ronaldo Bellazzini
Download or read book X-ray Polarimetry written by Ronaldo Bellazzini and published by Cambridge University Press. This book was released on 2010-07-08 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the advent of a new generation of detectors, X-ray polarimetry promises to join X-ray imaging, spectroscopy and timing as one of the main observational techniques in high energy astrophysics. This has renewed interest in the field, and indeed several polarimetric missions have recently been proposed. This volume provides a complete and up-to-date view of the subject for researchers in astrophysics. The contributors discuss the present status and perspectives of instruments, review current theoretical models, and examine future missions. As well as detailed papers, the book contains broad reviews that can be easily understood by astrophysicists new to the field.
Book Synopsis Polarimetry of Stars and Planetary Systems by : Ludmilla Kolokolova
Download or read book Polarimetry of Stars and Planetary Systems written by Ludmilla Kolokolova and published by Cambridge University Press. This book was released on 2015-05-14 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review of state-of-the-art techniques, models and research methods in modern astronomical polarimetry.
Book Synopsis Visualizing Chemistry by : National Research Council
Download or read book Visualizing Chemistry written by National Research Council and published by National Academies Press. This book was released on 2006-06-01 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists and engineers have long relied on the power of imaging techniques to help see objects invisible to the naked eye, and thus, to advance scientific knowledge. These experts are constantly pushing the limits of technology in pursuit of chemical imagingâ€"the ability to visualize molecular structures and chemical composition in time and space as actual events unfoldâ€"from the smallest dimension of a biological system to the widest expanse of a distant galaxy. Chemical imaging has a variety of applications for almost every facet of our daily lives, ranging from medical diagnosis and treatment to the study and design of material properties in new products. In addition to highlighting advances in chemical imaging that could have the greatest impact on critical problems in science and technology, Visualizing Chemistry reviews the current state of chemical imaging technology, identifies promising future developments and their applications, and suggests a research and educational agenda to enable breakthrough improvements.
Book Synopsis Neutron Stars and Pulsars by : Werner Becker
Download or read book Neutron Stars and Pulsars written by Werner Becker and published by Springer Science & Business Media. This book was released on 2009-02-11 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron stars are the most compact astronomical objects in the universe which are accessible by direct observation. Studying neutron stars means studying physics in regimes unattainable in any terrestrial laboratory. Understanding their observed complex phenomena requires a wide range of scientific disciplines, including the nuclear and condensed matter physics of very dense matter in neutron star interiors, plasma physics and quantum electrodynamics of magnetospheres, and the relativistic magneto-hydrodynamics of electron-positron pulsar winds interacting with some ambient medium. Not to mention the test bed neutron stars provide for general relativity theories, and their importance as potential sources of gravitational waves. It is this variety of disciplines which, among others, makes neutron star research so fascinating, not only for those who have been working in the field for many years but also for students and young scientists. The aim of this book is to serve as a reference work which not only reviews the progress made since the early days of pulsar astronomy, but especially focuses on questions such as: "What have we learned about the subject and how did we learn it?", "What are the most important open questions in this area?" and "What new tools, telescopes, observations, and calculations are needed to answer these questions?". All authors who have contributed to this book have devoted a significant part of their scientific careers to exploring the nature of neutron stars and understanding pulsars. Everyone has paid special attention to writing educational comprehensive review articles with the needs of beginners, students and young scientists as potential readers in mind. This book will be a valuable source of information for these groups.
Book Synopsis The 2007 ESO Instrument Calibration Workshop by : Andreas Kaufer
Download or read book The 2007 ESO Instrument Calibration Workshop written by Andreas Kaufer and published by Springer Science & Business Media. This book was released on 2008-05-05 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2007 ESO Instrument Calibration workshop brought together more than 120 participants with the objective to a) foster the sharing of information, experience and techniques between observers, instrument developers and instrument operation teams, b) review the actual precision and limitations of the applied instrument calibration plans, and c) collect the current and future requirements by the ESO users. These present proceedings include the majority of the workshop’s contributions and document the status quo of instrument calibration at ESO in large detail. Topics covered are: Optical Spectro-Imagers, Optical Multi-Object Spectrographs, NIR and MIR Spectro-Imagers, High-Resolution Spectrographs, Integral Field Spectrographs, Adaptive Optics Instruments, Polarimetric Instruments, Wide Field Imagers, Interferometric Instruments as well as other crucial aspects such as data flow, quality control, data reduction software and atmospheric effects. It was stated in the workshop that “calibration is a life-long learning process”'. In this sense, this book will be a reference point for all future efforts to improve instrument calibration procedures in astronomy.
Book Synopsis Nanoscale Photonic Imaging by : Tim Salditt
Download or read book Nanoscale Photonic Imaging written by Tim Salditt and published by Springer Nature. This book was released on 2020-06-09 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book, edited and authored by a team of world-leading researchers, provides a broad overview of advanced photonic methods for nanoscale visualization, as well as describing a range of fascinating in-depth studies. Introductory chapters cover the most relevant physics and basic methods that young researchers need to master in order to work effectively in the field of nanoscale photonic imaging, from physical first principles, to instrumentation, to mathematical foundations of imaging and data analysis. Subsequent chapters demonstrate how these cutting edge methods are applied to a variety of systems, including complex fluids and biomolecular systems, for visualizing their structure and dynamics, in space and on timescales extending over many orders of magnitude down to the femtosecond range. Progress in nanoscale photonic imaging in Göttingen has been the sum total of more than a decade of work by a wide range of scientists and mathematicians across disciplines, working together in a vibrant collaboration of a kind rarely matched. This volume presents the highlights of their research achievements and serves as a record of the unique and remarkable constellation of contributors, as well as looking ahead at the future prospects in this field. It will serve not only as a useful reference for experienced researchers but also as a valuable point of entry for newcomers.
Book Synopsis Astronomical Polarimetry by : Jaap Tinbergen
Download or read book Astronomical Polarimetry written by Jaap Tinbergen and published by Cambridge University Press. This book was released on 2005-08-22 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiation from astronomical objects generally shows some degree of polarization. Although this polarized radiation is usually only a small fraction of the total radiation, it often carries a wealth of information on the physical state and geometry of the emitting object and intervening material. Measurement of this polarized radiation is central to much modern astrophysical research. This handy volume provides a clear, comprehensive and concise introduction to astronomical polarimetry at all wavelengths. Starting from first principles and a simple physical picture of polarized radiation, the reader is introduced to all the key topics, including Stokes parameters, applications of polarimetry in astronomy, polarization algebra, polarization errors and calibration methods, and a selection of instruments (from radio to X-ray). The book is rounded off with a number of useful case studies, a collection of exercises, an extensive list of further reading and an informative index. This review of all aspects of astronomical polarization provides both an essential introduction for graduate students, and a valuable reference for practising astronomers.
Book Synopsis Portable Imaging Polarimeter and Imaging Experiments by :
Download or read book Portable Imaging Polarimeter and Imaging Experiments written by and published by . This book was released on 1999 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polarimetry is the method of recording the state of polarization of light. Imaging polarimetry extends this method to recording the spatially resolved state of polarization within a scene. Imaging-polarimetry data have the potential to improve the detection of manmade objects in natural backgrounds. We have constructed a midwave infrared complete imaging polarimeter consisting of a fixed wire-grid polarizer and rotating form-birefringent retarder. The retardance and the orientation angles of the retarder were optimized to minimize the sensitivity of the instrument to noise in the measurements. The optimal retardance was found to be 132° rather than the typical 90°. The complete imaging polarimeter utilized a liquid-nitrogen cooled PtSi camera. The fixed wire-grid polarizer was located at the cold stop inside the camera dewar. The complete imaging polarimeter was operated in the 4.42-5 [mu]m spectral range. A series of imaging experiments was performed using as targets a surface of water, an automobile, and an aircraft. Further analysis of the polarization measurements revealed that in all three cases the magnitude of circular polarization was comparable to the noise in the calculated Stokes-vector components.
Book Synopsis The Exoplanet Handbook by : Michael Perryman
Download or read book The Exoplanet Handbook written by Michael Perryman and published by Cambridge University Press. This book was released on 2018-08-30 with total page 973 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the discovery of planets beyond our solar system 25 years ago, exoplanet research has expanded dramatically, with new state-of-the-art ground-based and space-based missions dedicated to their discovery and characterisation. With more than 3,500 exoplanets now known, the complexity of the discovery techniques, observations and physical characterisation have grown exponentially. This Handbook ties all these avenues of research together across a broad range of exoplanet science. Planet formation, exoplanet interiors and atmospheres, and habitability are discussed, providing in-depth coverage of our knowledge to date. Comprehensively updated from the first edition, it includes instrumental and observational developments, in-depth treatment of the new Kepler mission results and hot Jupiter atmospheric studies, and major updates on models of exoplanet formation. With extensive references to the research literature and appendices covering all individual exoplanet discoveries, it is a valuable reference to this exciting field for both incoming and established researchers.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1994 with total page 1496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polarization: Measurement, Analysis and Remote Sensing by :
Download or read book Polarization: Measurement, Analysis and Remote Sensing written by and published by . This book was released on 2006 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Energy Update written by and published by . This book was released on 1983-10 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
