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Optical Techniques For Millimeter Wave Detection And Imaging
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Book Synopsis Optical Techniques for Millimeter-wave Detection and Imaging by : Christopher Arnim Schuetz
Download or read book Optical Techniques for Millimeter-wave Detection and Imaging written by Christopher Arnim Schuetz and published by ProQuest. This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The benefits of imaging using regions of the electromagnetic spectrum outside the visible range have been known for decades. Infrared and radio frequency imaging techniques have achieved great successes in both military and civilian applications. However, there remains a range of the spectrum between these two regimes that remains relatively unexplored. Millimeter waves, or the range of wavelengths between one millimeter and one centimeter, have remained relatively unexplored as an imaging technology, largely due to the lack of sufficiently sensitive, practical detectors for passive imaging in this regime. At these short wavelengths, the diffraction limit imposed by the limited extent of the imaging aperture significantly limits attainable image resolution. Recent developments in semiconductor low-noise amplifiers have demonstrated many desirable applications for such imaging technology, but have, as yet, not been able to demonstrate the economical, small-format imagers necessary to make such imagers practical in most of the conceived applications. In this regard, I present a new approach to millimeter-wave detection based on optical modulation with subsequent carrier suppression. This approach demonstrates promise in achieving the goal of economical, high-resolution imagers with sufficient sensitivity for passive millimeter-wave imaging. In this thesis, I explain the operational requirements of such detectors, provide theoretical background for their operation, and describe current experimental results obtained using commercially available components in the 35 GHz. In addition, I describe successful efforts to fabricate modulators with improved modulation bandwidths for detection in the 95 GHz atmospheric window. These demonstration systems have attained sufficient single pixel performance to detect thermal emission with a noise equivalent temperature difference (NETD) approaching 1K/[Special characters omitted.] at both 35 and 95 GHz. The NETDs attained correspond to sub-picowatt noise equivalent powers which, to the best of my knowledge, have never before been obtained without the use of millimeter-wave low noise amplifiers or cryogenic cooling. The described optically-based detection technique has also demonstrated unique advantages to overcoming the resolution limits imposed by aperture size. Since the optical upconversion process preserves the phase of the collected energy, coherent imaging methods are possible. This enables the use of distributed aperture imaging, which could potentially provide large effective apertures for high resolution without the associated volumetric scaling associated with traditional focal plane arrays. Optical fiber can be utilized to provide low-loss, dispersion-free routing of the upconverted energy and optical lenses and cameras can be used to reconstruct the sampled image in a relatively simple manner. The combination of these factors offers potential for a uniquely capable millimeter-wave imaging technology based on optical upconversion. As part of this dissertation, I describe the relevant parameters that must be considered in designing such an imager and present results from a prototype array that has been successfully demonstrated.
Book Synopsis Millimeter Wave Far-field Imaging Via Optical Upconversion Techniques by : Jesse Paul Samluk
Download or read book Millimeter Wave Far-field Imaging Via Optical Upconversion Techniques written by Jesse Paul Samluk and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Although millimeter wave (mmW) imaging has developed rapidly over the last decade, there is still much to learn about the imaging process as a whole as well as millimeter waves themselves. Millimeter waves are the range of wavelengths that exist between one millimeter to one centimeter (hence the term "millimeter wave"). Where infrared and radio frequency imaging has achieved great results over the past fifty years with the military, millimeter wave imaging remains unexplored in comparison. As stated previously, millimeter wave imaging has come into the spotlight during the last ten years as another approach for imaging. And with each evolution of millimeter wave imaging technology comes the potential for more possibilities to be researched. It is in this thesis that I present our own passive millimeter wave imager that images objects in the far field. The technology that is used for this imager is based on optical upconversion techniques, in which optical modulation is used with carrier suppression. I will also present the theoretical background of millimeter wave imaging, the operational requirements of the proposed architecture, the characterization of the millimeter wave image data, experimental results (images from the detector), and future work for the next iteration of the imager. To date, our system is capable of field testing, in which it has produced outstanding results for a relatively low-cost detector, and the results of that testing, as well as much more, are presented in this thesis.
Book Synopsis Passive Millimeter-wave Imaging Technology by :
Download or read book Passive Millimeter-wave Imaging Technology written by and published by . This book was released on 2000 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Passive Synthetic Aperture Array Imaging at Millimeter Wave Frequencies Using Novel Electro-optical Detection and Processing by :
Download or read book Passive Synthetic Aperture Array Imaging at Millimeter Wave Frequencies Using Novel Electro-optical Detection and Processing written by and published by . This book was released on 2006 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this effort we have designed, fabricated, and demonstrated a one-dimensional synthetic aperture imaging system for the passive imaging of millimeter waves (MMWs) using optical upconversion and correlation techniques. The advantage of this approach over alternate techniques is that the proposed system does not require expensive high-speed electronic detection and read out circuits and it is light enough to be used on UAV platforms. This technique eliminates the need for a lens and can provide high resolution at mm wavelengths by extending the baseline of the antenna array. We developed a novel optical feedback technique that allows us to lock the phase of each optical carrier with a coherent reference beam. We have demonstrated the feasibility of the technology by building a linear, four element sparse aperture antenna array capable of imaging at mm wavelengths using commercial, off-the-shelf telecommunications components. The system was used to image a 35 0Hz plane wave and demonstrated near diffraction limited resolution.
Book Synopsis Integrated Imaging and Vision Techniques for Industrial Inspection by : Zheng Liu
Download or read book Integrated Imaging and Vision Techniques for Industrial Inspection written by Zheng Liu and published by Springer. This book was released on 2015-09-24 with total page 541 pages. Available in PDF, EPUB and Kindle. Book excerpt: This pioneering text/reference presents a detailed focus on the use of machine vision techniques in industrial inspection applications. An internationally renowned selection of experts provide insights on a range of inspection tasks, drawn from their cutting-edge work in academia and industry, covering practical issues of vision system integration for real-world applications. Topics and features: presents a comprehensive review of state-of-the-art hardware and software tools for machine vision, and the evolution of algorithms for industrial inspection; includes in-depth descriptions of advanced inspection methodologies and machine vision technologies for specific needs; discusses the latest developments and future trends in imaging and vision techniques for industrial inspection tasks; provides a focus on imaging and vision system integration, implementation, and optimization; describes the pitfalls and barriers to developing successful inspection systems for smooth and efficient manufacturing process.
Book Synopsis Microwave and Millimeter-wave Remote Sensing for Security Applications by : Jeffrey A. Nanzer
Download or read book Microwave and Millimeter-wave Remote Sensing for Security Applications written by Jeffrey A. Nanzer and published by Artech House. This book was released on 2012 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave and millimeter-wave remote sensing techniques are fast becoming a necessity in many aspects of security as detection and classification of objects or intruders becomes more difficult. This groundbreaking resource offers you expert guidance in this burgeoning area. It provides you with a thorough treatment of the principles of microwave and millimeter-wave remote sensing for security applications, as well as practical coverage of the design of radiometer, radar, and imaging systems. You learn how to design active and passive sensors for intruder detection, concealed object detection, and human activity classification. This detailed book presents the fundamental concepts practitioners need to understand, including electromagnetic wave propagation in free space and in media, antenna theory, and the principles of receiver design. You find in-depth discussions on the interactions of electromagnetic waves with human tissues, the atmosphere and various building and clothing materials. This timely volume explores recently developed detection techniques, such as micro-Doppler radar signatures and correlation radiometry. The book is supported with over 200 illustrations and 1,135 equations.
Book Synopsis Broadband Optical Modulators by : Antao Chen
Download or read book Broadband Optical Modulators written by Antao Chen and published by CRC Press. This book was released on 2016-04-19 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: "provides the full, exciting story of optical modulators. a comprehensive review, from the fundamental science to the material and processing technology to the optimized device design to the multitude of applications for which broadband optical modulators bring great value. Especially valuable in my view is that the authors are internationally
Book Synopsis Non-Imaging Microwave and Millimetre-Wave Sensors for Concealed Object Detection by : Boris Y. Kapilevich
Download or read book Non-Imaging Microwave and Millimetre-Wave Sensors for Concealed Object Detection written by Boris Y. Kapilevich and published by CRC Press. This book was released on 2017-12-19 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to the ever-increasing global threat of terrorist attacks, the personal screening industry has been growing at a rapid rate. Many methods have been developed for detecting concealed weapons and explosives on the human body. In this important new book, the authors discuss their experiences over the last decade designing and testing microwave and millimetre wave detection and screening systems. It includes examples of actual devices that they have built and tested, along with test results that were obtained in realistic scenarios. The book focuses on the development of non-imaging detection systems, which are similar to radar. These systems do not form a conventional image of the scene and the person(s) being screened. Instead, the sensors detect and analyze the effect that the body, and any concealed objects, has on a transmitted waveform. These systems allow remote detection of both metallic and dielectric devices concealed on the human body in both indoor and outdoor environments. The book discusses a number of sensor types, including active millimetre wave sensors using the direct detection and the heterodyne approach, active microwave sensors for CNR-based object detection, passive millimetre wave sensors, and the role of shielding effects in operating non-imaging MM-wave sensors. The goal of this book is to systemize the test results obtained by the authors, helping specialists to develop improved screening systems in the future. Another goal is to show how the use of non-imaging systems can reduce the cost of the screening process.
Book Synopsis Counterterrorist Detection Techniques of Explosives by : Jehuda Yinon
Download or read book Counterterrorist Detection Techniques of Explosives written by Jehuda Yinon and published by Elsevier. This book was released on 2011-10-13 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: The detection of hidden explosives has become an issue of utmost importance in recent years. While terrorism is not new to the international community, recent terrorist attacks have raised the issue of detection of explosives and have generated a great demand for rapid, sensitive and reliable methods for detecting hidden explosives. Counterterrorist Detection Techniques of Explosives covers recent advances in this area of research including vapor and trace detection techniques (chemiluminescence, mass spectrometry, ion mobility spectrometry, electrochemical methods and micromechanical sensors, such as microcantilevers) and bulk detection techniques (neutron techniques, nuclear quadrupole resonance, x-ray diffraction imaging, millimeter-wave imaging, terahertz imaging and laser techniques). This book will be of interest to any scientists involved in the design and application of security screening technologies including new sensors and detecting devices which will prevent the smuggling of bombs and explosives. * Covers latest advances in vapor and trace detection techniques and bulk detection techniques* Reviews both current techniques and those in advanced stages of development* Techniques that are described in detail, including its principles of operation, as well as its applications in the detection of explosives
Book Synopsis Sensing with Terahertz Radiation by : Daniel Mittleman
Download or read book Sensing with Terahertz Radiation written by Daniel Mittleman and published by Springer. This book was released on 2013-02-26 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is two-fold. First, the various different methods of accessing the THz range are discussed, with a view to convince the reader that there have been qualitative and significant improvements over older, more conventional techniques. The text makes it clear that these improvements enable practical "real-world" applications of THz technology, in a manner which would not have been possible before. Second, the demonstrations and feasibility tests described serve as compelling evidence of the utility of such devices. Due to the unique characteristics of THz radiation and its interaction with materials, these devices have substantial advantages over other competing technologies in a number of different areas.
Book Synopsis Terahertz Spectroscopy and Imaging by : Kai-Erik Peiponen
Download or read book Terahertz Spectroscopy and Imaging written by Kai-Erik Peiponen and published by Springer. This book was released on 2012-10-04 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state-of-the-art of Terahertz spectroscopy. It is a modern source for a beginners and researcher interested in THz spectroscopy. The basics and physical background of THz spectroscopy and technology are explained, and important applications are described. The book presents the highlights of scientific research in the field of THz science and provides an excellent overview of the field and future directions of research. Over the last decade the field of terahertz spectroscopy has developed into one of the most rapidly growing fields of spectroscopy with large impact across a wide range of scientific disciplines. Due to substantial advances in femtosecond laser technology, terahertz time-domain spectroscopy (THz-TDS) has established itself as the dominant spectroscopic technique for experimental scientists interested in measurements in this frequency range. In solids and liquids terahertz radiation is at resonance with both phonon modes and hydrogen bonding modes which makes it an ideal tool to study the interaction between molecules in a unique way, thus opening a wealth of opportunities for research in physics, chemistry, biology, materials science and pharmaceuticals. This book provides an easy access to scientists, engineers and students alike who want to understand the theory and applications of modern terahertz spectroscopy.
Book Synopsis Advanced Millimeter-wave Technologies by : Duixian Liu
Download or read book Advanced Millimeter-wave Technologies written by Duixian Liu and published by John Wiley & Sons. This book was released on 2009-03-03 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains one of the hottest topics in wireless and electronic devices community, namely the wireless communication at mmWave frequencies, especially at the 60 GHz ISM band. It provides the reader with knowledge and techniques for mmWave antenna design, evaluation, antenna and chip packaging. Addresses practical engineering issues such as RF material evaluation and selection, antenna and packaging requirements, manufacturing tolerances, antenna and system interconnections, and antenna One of the first books to discuss the emerging research and application areas, particularly chip packages with integrated antennas, wafer scale mmWave phased arrays and imaging Contains a good number of case studies to aid understanding Provides the antenna and packaging technologies for the latest and emerging applications with the emphases on antenna integrations for practical applications such as wireless USB, wireless video, phase array, automobile collision avoidance radar, and imaging
Book Synopsis Infrared and Millimeter Waves V4 by : Kenneth J. Button
Download or read book Infrared and Millimeter Waves V4 written by Kenneth J. Button and published by Elsevier. This book was released on 2014-04-08 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrared and Millimeter Waves is a series of books that compiles the work of several authors, with each volume focusing on certain aspects of infrared and millimeter waves, such as sources of radiation, instrumentation, and millimeter systems. This book concerns itself with millimeter systems. Comprised of seven chapters, this book discusses several systems that involve the use of millimeter waves, such as radars and missile guidance systems. The first chapter provides a comprehensive overview of millimeter waves, while the succeeding chapter discusses several technologies that involve millimeter systems, such as radar, missile guidance, and imaging systems. This book will be of great use to researchers and professionals whose work involves infrared and millimeter waves.
Book Synopsis Millimeter-wave and Terahertz Imaging Techniques by : Enrique Nova Lavado
Download or read book Millimeter-wave and Terahertz Imaging Techniques written by Enrique Nova Lavado and published by . This book was released on 2014 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the development and assessment of imaging techniques in the millimeterwave (mmW) and terahertz frequency bands. In the first part of the thesis, the development of a 94 GHz passive screener based on a total-power radiometer (TPR) with mechanical beamscanning is presented. Several images have been acquired with the TPR screener demonstrator, either in indoor and outdoor environments, serving as a testbed to acquire the know-how required to perform the research presented in the following parts of the thesis. In the second part of the thesis, a theoretical research on the performance of near-field passive screeners is described. This part stands out the tradeoff between spatial and radiometric resolutions taking into account the image distortion produced by placing the scenario in the near-field range of the radiometer array. In addition, the impact of the decorrelation effect in the image has been also studied simulating the reconstruction technique of a synthetic aperture radiometer. Guidelines to choose the proper radiometer depending on the application, the scenario, the acquisition speed and the tolerated image distortion are given in this part. In the third part of the thesis, the development of a correlation technique with optical processing applicable to millimeter-wave interferometric radiometers is described. The technique is capable of correlating wide-bandwidth signals in the optical domain with no loss of radiometric sensitivity. The theoretical development of the method as well as measurements validating the suitability to correlate radiometric signals are presented in this part. In the final part of the thesis, the frequency band of the imaging problem is increased to frequencies beyond 100 GHz, covering the THz band. In this case the research is centered in tomographic techniques that include spectral information of the samples in the reconstructed images. The tomographic algorithm can provide detection and identification of chemical compounds that present a certain spectral footprint in the THz frequency band.
Book Synopsis Next Generation Wireless Communication by : Mohammed El Ghzaoui
Download or read book Next Generation Wireless Communication written by Mohammed El Ghzaoui and published by Springer Nature. This book was released on 2024 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Metamaterial-Based Optical and Radio Frequency Sensing by : Jun Luo
Download or read book Metamaterial-Based Optical and Radio Frequency Sensing written by Jun Luo and published by Springer Nature. This book was released on 2023-07-01 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the fundamentals and practical methods of metamaterials-based optical and radio frequency sensing. Combined with engineering practices, the book illustrates in detail wide frequency electromagnetic signal cloaking and the detection behavior of metasurfaces, including the structure of metasurfaces, electric-controlled behaviors, layout design and fabrication methods, and related experiment results. This book is expected to inspire the research and development of new optical and radio frequency detectors. It is suitable for researchers and engineers working on semiconductor devices, applied optics, and wide frequency signal detection. It is also a good reference for students in these areas.
Book Synopsis Photoacoustic Imaging and Spectroscopy by : Lihong V. Wang
Download or read book Photoacoustic Imaging and Spectroscopy written by Lihong V. Wang and published by CRC Press. This book was released on 2017-12-19 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photoacoustics promises to revolutionize medical imaging and may well make as dramatic a contribution to modern medicine as the discovery of the x-ray itself once did. Combining electromagnetic and ultrasonic waves synergistically, photoacoustics can provide deep speckle-free imaging with high electromagnetic contrast at high ultrasonic resolution and without any health risk. While photoacoustic imaging is probably the fastest growing biomedical imaging technology, this book is the first comprehensive volume in this emerging field covering both the physics and the remarkable noninvasive applications that are changing diagnostic medicine. Bringing together the leading pioneers in this field to write about their own work, Photoacoustic Imaging and Spectroscopy is the first to provide a full account of the latest research and developing applications in the area of biomedical photoacoustics. Photoacoustics can provide functional sensing of physiological parameters such as the oxygen saturation of hemoglobin. It can also provide high-contrast functional imaging of angiogenesis and hypermetabolism in tumors in vivo. Discussing these remarkable noninvasive applications and so much more, this reference is essential reading for all researchers in medical imaging and those clinicians working at the cutting-edge of modern biotechnology to develop diagnostic techniques that can save many lives and just as importantly do no harm.
