Sökning: "laser guide stars"

Hittade 3 avhandlingar innehållade orden laser guide stars.

  1. 1. Methods of Multi-Conjugate Adaptive Optics for Astronomy

    Detta är en avhandling från Lund Observatory, Lund University

    Författare :Ralf Flicker; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Adaptive optics; anisoplanatism; laser guide stars; performance estimation; wavefront reconstruction; extremely large telescopes; optics; Electromagnetism; Elektromagnetism; acoustics; Astronomy; akustik; space research; optik; multi-conjugate; cosmic chemistry; Astronomi; rymdvetenskap; kosmisk kemi; Fysicumarkivet A:2003:Flicker;

    Sammanfattning : This work analyses several aspects of multi-conjugate adaptive optics (MCAO) for astronomy. The research ranges from fundamental and technical studies for present-day MCAO projects, to feasibility studies of high-order MCAO instruments for the extremely large telescopes (ELTs) of the future. LÄS MER

  2. 2. Characterising Emblematic Binaries at the Lowest Stellar and Substellar Masses

    Detta är en avhandling från Stockholm : Department of Astronomy, Stockholm University

    Författare :Per Calissendorff; Markus Janson; Koraljka Mužić; [2020]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; astrometry; binaries; brown dwarfs; low-mass stars; multiplicity; substellar; Astronomy; astronomi;

    Sammanfattning : Stars are involved in most research fields of astronomy, ranging from studies of faraway galaxies, exploding supernovae, to more nearby exoplanets and even our own Sun. As such, it is paramount that our physical interpretation of stars is accurate. LÄS MER

  3. 3. Extremely Large Telescopes Optical Design and Wavefront Correction

    Detta är en avhandling från Lund Observatory, Lund University

    Författare :Alexander Gontcharov; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy; akustik; optik; Adaptive Optics; Extremely Large Telescopes; optical design methods; wavefront correction methods.; Electromagnetism; optics; Elektromagnetism; acoustics; space research; cosmic chemistry; Astronomi; rymdvetenskap; kosmisk kemi;

    Sammanfattning : An overview of the state of art within optical design of large astronomical telescopes is given. Recent advances within the field are presented. The importance of new computer-controlled mirror-polishing methods is emphasized. LÄS MER