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Adaptive Optics For Astronomical Telescopes

Adaptive Optics For Astronomical Telescopes
Author: John W. Hardy
Publisher: Oxford University Press on Demand
ISBN: 9780195090192
Size: 53.53 MB
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This book, written by one of the leaders in the field, covers the principles and theory of adaptive optics, and describes in detail how this technology can be applied to large ground-based telescopes to conmpensate for the effects of atmospheric turbulence. In addition to information on basic adaptive optics components and technology, there are chapters on atmospheric turbulence, optical image structure, laser beacons, and overall system design. The overall design ofadaptive optics systems, including performance estimation and optimization, receives detailed treatment. This book provides a fundamental understanding of the physical principles of adaptive optics technology, so that it will have lasting value as a complete and accessible source ofreference.
Adaptive Optics for Astronomical Telescopes
Language: un
Pages: 438
Authors: John W. Hardy
Categories: Science
Type: BOOK - Published: 1998 - Publisher: Oxford University Press on Demand
This book, written by one of the leaders in the field, covers the principles and theory of adaptive optics, and describes in detail how this technology can be applied to large ground-based telescopes to conmpensate for the effects of atmospheric turbulence. In addition to information on basic adaptive optics components and technology, there are chapters on atmospheric turbulence, optical image structure, laser beacons, and overall system design. The overall design ofadaptive optics systems, including performance estimation and optimization, receives detailed treatment. This book provides a fundamental understanding of the physical principles of adaptive optics technology, so that it will have lasting value as a complete and accessible source ofreference.
Laser Guide Star Adaptive Optics for Astronomy
Language: un
Pages: 340
Authors: N. Ageorges, C. Dainty
Categories: Science
Type: BOOK - Published: 2013-04-17 - Publisher: Springer Science & Business Media
Adaptive optics allows the theoretical limit of angular resolution to be achieved from a large telescope, despite the presence of turbulence. Thus an eight meter class telescope, such as one of the four in the Very Large Telescope operated by ESO in Chile, will in future be routinely capable of an angular resolution of almost 0.01 arcsec, compared tot he present resolution of about 0.5 arcsec for conventional imaging in good condition. All the world's major telescopes either have adaptive optics or are in the process of building AO systems. It turns out that a reasonable fraction of the sky can be observed using adaptive optics, with moderately good imaging quality, provided imaging in done in the near IR. To move out of the near IR, with its relatively poor angular resolution, astronomers need a laser guide star. There is a layer of Na atoms at approximately 90 km altitude that can be excited by a laser to produce such a source, or Rayleigh scattering can be employed lower in the atmosphere. But the production and use of laser guide stars is not trivial, and the key issues determining their successful implementation are discussed here, including the physics of the
Adaptive Optics in Astronomy
Language: un
Pages: 411
Authors: François Roddier
Categories: Science
Type: BOOK - Published: 1999-06-17 - Publisher: Cambridge University Press
Adaptive optics is set to revolutionise the future of astronomy; this is the first book on the subject and is set to become the standard reference.
Adaptive Optics for Astronomy
Language: un
Pages: 338
Authors: D.M. Alloin, Jean-Marie Mariotti
Categories: Science
Type: BOOK - Published: 1994-03-31 - Publisher: Springer Science & Business Media
The blossoming of adaptive optical techniques has brought about a revolution in the field of astronomical observation. Coupled with the new generation of large, ground-based telescopes, it allows us to achieve an unprecendented angular resolution in the analysis of faint astronomical sources at optical wavelengths. This book provides the basic concepts of adaptive optics, discusses the possible instrumental strategies and the state-of-the-art technical achievements of this development and presents the key astrophysical programs which will most benefit from it. Over fifteen well-known experts have contributed to making this volume a comprehensive one, with steady progression as well as full coverage of the various aspects of the field. Students graduating in optical sciences and astrophysics, astronomers, engineers interested in atmospheric turbulence compensation will find this book a reference text on the subject.
High Performance Computing for Adaptive Optics and the Victoria Open Loop Testbed
Language: un
Pages:
Authors: Michael Fischer
Categories: Science
Type: BOOK - Published: 2008 - Publisher:
This thesis addresses high performance computing in Adaptive Optics (AO) simulation and the development and demonstration of a prototype AO instrument for future Extremely Large Telescopes (ELTs). Adaptive Optics systems are used on astronomical telescopes for correcting the blurring effects of atmospheric turbulence on incoming starlight, improving image quality to that of the diffraction limit of the telescope. Extremely Large Telescopes will have primary mirror diameters in the 20 - 40 m range, driving the need for technology development in two key areas, among others: 1) adaptive optics simulation, and 2) wide field adaptive optics (WFAO). The Linear Adaptive Optics Simulator (LAOS) is at the forefront of adaptive optics simulation, opening up the capability to simulate ELTs with integrated AO systems on a single computer. This is computationally expensive and time consuming, and thus simulator performance is very important and can determine the feasibility of simulating such systems at all. Efforts were made to improve the existing LAOS performance and bring a larger range of problem sizes and AO instrument concepts including WFAO into the realm of possibility. WFAO will take advantage of the larger light collection and spatial resolution capabilities of ELTs. One WFAO instrument approach that addresses this
Bis zum Ende der Zeit
Language: de
Pages: 448
Authors: Brian Greene
Categories: Science
Type: BOOK - Published: 2020-04-27 - Publisher: Siedler Verlag
Ein neuer Blick auf den Anfang und das Ende unseres Universums Der weltbekannte Physiker Brian Greene schreibt die Geschichte des Universums, vom Urknall bis zu seinem Ende. Und die Geschichte des Menschen in diesem Universum. Er zeigt, wie sich in einem fast unendlichen Meer von Chaos und Unordnung Leben und Bewusstsein entwickeln konnten. Es ist eine Reise zu wandernden Planeten und wirbelnden Galaxien – und zugleich eine wunderbare Erzählung über das Streben des Menschen nach Sinn im Angesicht der Vergänglichkeit.
The Principles of Astronomical Telescope Design
Language: un
Pages: 634
Authors: Jingquan Cheng
Categories: Science
Type: BOOK - Published: 2010-03-14 - Publisher: Springer Science & Business Media
This book presents a complete summary of the author's twenty five years of experience in telescope design. It provides a general introduction to every aspect of telescope design. It also discusses the theory behind telescope design in depth, which makes it a good reference book for professionals. It covers Radio, Infrared, Optical, X-Ray and Gamma-Ray wavelengths. Originally published in Chinese.
High Performance Computing for Adaptive Optics and the Victoria Open Loop Testbed
Language: un
Pages:
Authors: Jingquan Cheng
Categories: Science
Type: BOOK - Published: 2004 - Publisher:
This thesis addresses high performance computing in Adaptive Optics (AO) simulation and the development and demonstration of a prototype AO instrument for future Extremely Large Telescopes (ELTs). Adaptive Optics systems are used on astronomical telescopes for correcting the blurring effects of atmospheric turbulence on incoming starlight, improving image quality to that of the diffraction limit of the telescope. Extremely Large Telescopes will have primary mirror diameters in the 20 - 40 m range, driving the need for technology development in two key areas, among others: 1) adaptive optics simulation, and 2) wide field adaptive optics (WFAO). The Linear Adaptive Optics Simulator (LAOS) is at the forefront of adaptive optics simulation, opening up the capability to simulate ELTs with integrated AO systems on a single computer. This is computationally expensive and time consuming, and thus simulator performance is very important and can determine the feasibility of simulating such systems at all. Efforts were made to improve the existing LAOS performance and bring a larger range of problem sizes and AO instrument concepts including WFAO into the realm of possibility. WFAO will take advantage of the larger light collection and spatial resolution capabilities of ELTs. One WFAO instrument approach that addresses this
Einführung in Astronomie und Astrophysik
Language: de
Pages: 624
Authors: Arnold Hanslmeier
Categories: Science
Type: BOOK - Published: 2013-12-02 - Publisher: Springer-Verlag
Astronomie und Astrophysik sind älteste und modernste Wissenschaft in einem – sie vereinigen Beobachtungstradition und zugleich modernste Technik und Beobachtungsmethoden. Dieses Einführungslehrbuch erscheint bereits in der dritten Auflage und das sich Astrophysik sehr rasch weiterentwickelt wurden alle Kapiteln erweitert und ergänzt. Ein weiteres Kapitel, Astrobiologie, ein sehr aktuelles Forschungsgebiet, wurde hinzugefügt. Das Buch ist für Physik- und Astronomiestudierende (Lehramt, Diplom) gedacht, aber auch für ernsthaft an Naturwissenschaften interessierte Personen mit entsprechendem mathematisch/physikalischem Basiswissen. Das Grundwissen über theoretische und praktische Methoden, Fakten über die faszinierenden Objekte wie supermassive Schwarze Löcher in Galaxienkernen, Simulation von Sternen am Computer, aber auch klassische Astronomie wird kompakt vermittelt, und die Aufgaben mit Lösungen am Ende der Kapitel dienen als Selbstkontrolle bzw. Erweiterung. 1. Einleitung –Übersicht 2. Sphärische Astronomie 3. Geschichte der Astronomie 4. Himmelsmechanik 5. Astronomische Instrumente 6. Physik der Körper des Sonnensystems 7. Die Sonne 8. Zustandsgrößen der Sterne 9. Sternatmosphären 10. Sternaufbau 11. Sternentwicklung 12. Interstellare Materie 13. Galaxis 14. Extragalaktische Systeme 15. Ko smologie 16. Astrobiologie 17. Mathematische Methoden
Characterization of an Adaptive Optics System for Vision Studies
Language: un
Pages: 55
Authors: Yu Bai
Categories: Eye
Type: BOOK - Published: 2016 - Publisher:
Adaptive optics (AO) is a technology used to sharpen images through real time compensation of optical aberrations. The adaptive optics was firstly used in astronomical telescopes. Now this technique is widely adopted in fields encompassing physics, chemistry, electronics, and computer science. Particularly in vision science, adaptive optics can compensate the aberrations in the eye such that the information of a diseased eye can be read easily. Though the adaptive optics technology is relatively young, it has been demonstrated for advanced ophthalmoscopy as well as for vision test. In this thesis, a commercially available adaptive optics system was assembled up and tested firstly. Then the adaptive optics system was modified to test an eye model. The eye model consists of a lens and a movable mirror, which can simulate different types of diseased eyes by changing the distance between the mirror and the lens. The diseased eye model introduced aberrations to the system, and the deformable mirror in the adaptive optics system was activated and changed the shape to compensate the aberrations. But the correction range by the deformable mirror is limited. By testing the simple eye model, the working range of the deformable mirror and the wavefront sensor were characterized