Download or read book Advanced Wavefront Sensor Concepts written by J. K. Bowker and published by . This book was released on 1981 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this effort was to investigate advances in wavefront sensor technology for use in future adaptive optics systems. The improvements sought over presently developed adaptive optics systems are preliminary in the areas of component efficiency and sub-system complexity, since this would have potential for major operational simplicity and reduced cost. The concept under study in this effort is the Large Scale Integrated Imaging Irradiance (LSI3) sensor. This is based on the Integrated Imaging Irradiance (I3) sensor (U.S. Patent No. 4,141,652). The I3 sensor is based on the Hartmann concepts, but does not suffer from the optical alignment problems inherent to previously developed Hartmann sensors. Another of the major advantages of the LSI3 sensor over the Hartmann sensors (including the previously developed I3 sensor) is that the LSI3 sensor utilizes the full aperture of the system in dividing the input photon flux into the respective quadrants which results in better diffraction - limited resolution. The LSI3 sensor is based on an optical system that is independent of the number of sub-apertures selected. The major tasks of this study included the conceptual design of a small version (approximately 20 channels), a large scale (approximately 200 channels) wavefront sensor, and the evaluation of the expected performance, complexity, and cost of these prototype models. The result of these design advancements is a new wavefront sensor (LSI3) which could provide cost and performance advances for future adaptive optics systems.
Download or read book Advanced Wavefront Sensors for Enhanced Adaptive Optics written by Sam J. Potier and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Introduction to Wavefront Sensors written by Joseph M. Geary and published by SPIE Press. This book was released on 1995 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a practical book on wavefront sensing. Emphasis is on principles and techniques, rather than detailed mathematical analysis of such systems. The goal is to provide the reader with a qualitative understanding of wavefront sensor operation.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1979 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Figure Sensor written by Robert Crane and published by . This book was released on 1970 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Turbulence Astronomy Meets Meteorology Proceedings Of The Optical Turbulence Characterization For Astronomical Applications written by Elena Masciadri and published by World Scientific. This book was released on 2009-09-14 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects most of the talks and poster presentations presented at the 'Optical Turbulence — Astronomy meets Meteorology' international conference held on 15-18 September, 2008 at Nymphes Bay, Alghero, Sardinia, Italy. The meeting aimed to deal with one of the major causes of wavefront perturbations limiting the astronomical high-angular-resolution observations from the ground. The uniqueness of this meeting has been the effort to attack this topic in a synergic and multidisciplinary approach promoting constructive discussions between the actors of this science — the astronomers, meteorologists, physicists of the atmosphere and the experts in adaptive optics and interferometry techniques whose main goal is to correct, in real-time, the wavefront perturbations induced by atmospheric turbulence to restore at the telescope foci the best available image quality./a
Download or read book National Optical Astronomy Observatories Newsletter written by and published by . This book was released on 1991 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Concepts in Adaptive Optics written by Kristie Ames and published by . This book was released on 2015-02-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced optics is a technique employed to enhance the performance of optical systems through reduction of the impact of wavefront distortions. Developments in adaptive optics technology and applications have moved ahead at a fast pace. The general idea of wavefront compensation in real-time has been present since the mid-1970s. The first broadly employed application of adaptive optics was for compensating atmospheric turbulence effects in astronomical imaging and laser beam propagation. Whereas some topics have undergone research for years, even decades, new developments and applications in the supporting technologies keep emerging almost every day. This book is a compilation of contributions made by authors from across the world. The topics covered in this book are adaptive optics and the human eye, image post-processing, atmospheric turbulence characterization, deformable mirrors, high power laser distortion compensation, astronomy with huge telescopes, and wave-front sensors among others. Descriptive information on all these topics has been provided in this book.
Download or read book Report to the Congress on the Strategic Defense Initiative written by Strategic Defense Initiative Organization (U.S.) and published by . This book was released on 1989 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Department of Defense Authorization for Appropriations for Fiscal Year 1986 written by United States. Congress. Senate. Committee on Armed Services and published by . This book was released on 1985 with total page 1556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optics in Astrophysics written by Renaud Foy and published by Springer Science & Business Media. This book was released on 2006-01-14 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Astrophysics is facing challenging aims such as deep cosmology at redshift higher than 10 to constrain cosmology models, or the detection of exoplanets, and possibly terrestrial exoplanets, and several others. It requires unprecedented ambitious R&D programs, which have definitely to rely on a tight cooperation between astrophysics and optics communities. The book addresses most of the most critical interdisciplinary domains where they interact, or where they will do. A first need is to collect more light, i.e. telescopes still larger than the current 8-10 meter class ones. Decametric, and even hectometric, optical (from UV to IR wavelengths) telescopes are being studied. Whereas up to now the light collecting surface of new telescopes was approximately 4 times that of the previous generation, now this factor is growing to 10 to 100. This quantum leap urges to implement new methods or technologies developed in the optics community, both in academic labs and in the industry. Given the astrophysical goals and technological constraints, new generation adaptive optics with a huge number of actuators and laser guide stars devices have to be developed, from theoretical bases to experimental works. Two other newcomers in observational astrophysics are interferometric arrays of optical telescopes and gravitational wave detectors. Up-to-date reviews of detectors and of spectrographs are given, as well as forefront R&D in the field of optical coatings and of guided optics. Possible new ways to handle photons are also addressed, based on quantum physics. More and more signal processing algorithms are a part and parcel of any modern instrumentation. Thus finally the book gives two reviews about wavefront processing and about image restoration and deconvolution algorithms for ill conditioned cases.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1989 with total page 1704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Optical Devices and Applications April 10 11 1980 Washington D C written by William J. Cuneo and published by . This book was released on 1980 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Adaptive Optics written by Robert K. Tyson and published by CRC Press. This book was released on 2022-02-28 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Adaptive Optics describes the foundations, principles, and applications of adaptive optics (AO) and its enabling technologies. This leading textbook addresses the fundamentals of AO at the core of astronomy, high-energy lasers, biomedical imaging, and optical communications. Key Features: Numerous examples to explain and support the underlying principles Hundreds of new references to support the topics that are addressed End-of-chapter questions and exercises A complete system design example threaded through each chapter as new material is introduced
Download or read book Advanced Optical Methods for Brain Imaging written by Fu-Jen Kao and published by Springer. This book was released on 2018-05-14 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the rapidly developing field of advanced optical methods for structural and functional brain imaging. As is known, the brain is the most poorly understood organ of a living body. It is indeed the most complex structure in the known universe and, thus, mapping of the brain has become one of the most exciting frontlines of contemporary research. Starting from the fundamentals of the brain, neurons and synapses, this book presents a streamlined and focused coverage of the core principles, theoretical and experimental approaches, and state-of-the-art applications of most of the currently used imaging methods in brain research. It presents contributions from international leaders on different photonics-based brain imaging modalities and techniques. Included are comprehensive descriptions of many of the technology driven spectacular advances made over the past few years that have allowed novel insights of the structural and functional details of neurons. The book is targeted at researchers, engineers and scientists who are working in the field of brain imaging, neuroscience and connectomics. Although this book is not intended to serve as a textbook, it will appeal to undergraduate students engaged in the specialization of brain imaging.
Download or read book Optical Fiber Sensor Technology written by L.S. Grattan and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Fiber Sensor Technology, Advanced Applications - Bragg Gratings and Distributed Sensors, builds upon the foundations of the subject in the preceding four volumes of this series, concentrating as they do upon both applications and the technology of advanced optical fiber sensors. Previous volumes have covered the fundamentals of the field, devices and systems and chemical and environmental monitoring. This volume deals with a range of highly topical sensor devices and commercial systems, with considerable emphasis upon one of the most important areas, Bragg gratings in fibers, their fabrication and applications in advanced sensor systems and the principles and use of distributed fiber optic sensors. The volume is well illustrated and referenced, pointing to hundreds of key publications accessible in the open literature. It draws upon a group of authors with an international reputation for their work in the area, carefully edited into a coherent and logical text by the editors, based on their considerable experience in the field. This book series will provide an invaluable source for researchers, engineers and advanced students in the field of optical fibers, optoelectronics and measurement and sensing.
