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General theory of light propagation and imaging through the atmosphere / T. Stewart McKechnie
Resource type: Ressourcentyp: Buch (Online)Book (Online)Language: English Series: Springer series in optical sciences ; 196Publisher: Cham [u.a.] : Springer, 2016Description: Online-Ressource (XXIX, 624 p. 190 illus., 13 illus. in color) : online resourceISBN:- 9783319182094
- 535.2 23
- 537.6 23
- QC350-467
- QC630-648
- QC350-467 QC630-648
Contents:
Summary: This book lays out a new, general theory of light propagation and imaging through Earth’s turbulent atmosphere. Current theory is based on the - now widely doubted - assumption of Kolmogorov turbulence. The new theory is based on a generalized atmosphere, the turbulence characteristics of which can be established, as needed, from readily measurable properties of point-object, or star, images. The pessimistic resolution predictions of Kolmogorov theory led to lax optical tolerance prescriptions for large ground-based astronomical telescopes which were widely adhered to in the 1970s and 1980s. Around 1990, however, it became clear that much better resolution was actually possible, and Kolmogorov tolerance prescriptions were promptly abandoned. Most large telescopes built before 1990 have had their optics upgraded (e.g., the UKIRT instrument) and now achieve, without adaptive optics (AO), almost an order of magnitude better resolution than before. As well as providing a more comprehensive and precise understanding of imaging through the atmosphere with large telescopes (both with and without AO), the new general theory also finds applications in the areas of laser communications and high-energy laser beam propagationPPN: PPN: 834282917Package identifier: Produktsigel: ZDB-2-PHA
IntroductionTerms, Definitions and Theoretical foundations -- Diffraction -- Wave propagation after scattering by a thin atmospheric layer -- Wave propagation over extended atmospheric paths -- Properties of point-object im ages formed by telescopes -- Properties of point-object im ages formed by telescopes -- Average intensity envelopes of unresolved star images -- Core and halo structure in star images formed by large telescopes -- Statistical properties of stellar speckle patterns -- Star image appear ance for small and large average turbulence structure sizes -- Approximate intensity envelopes for star images formed by telescopes with/without AO -- Telescope optical tolerances and telescope resolution -- Laboratory simulation of im ages formed by large telescopes -- Laser beam propagation and atmospheric path characterization.- Atmospheric isoplanatic angle: Image stabilization and AO image correction.
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Reproduktion. (Springer eBook Collection. Physics and Astronomy)