| 书目名称 | Laser Guide Star Adaptive Optics for Astronomy | | 编辑 | N. Ageorges,C. Dainty | | 视频video | | | 丛书名称 | Nato Science Series C: | | 图书封面 |  | | 描述 | Adaptive optics allows the theoretical limit of angularresolution to be achieved from a large telescope, despite the presenceof turbulence. Thus an eight meter class telescope, such as one of thefour in the Very Large Telescope operated by ESO in Chile, will infuture be routinely capable of an angular resolution of almost 0.01arcsec, compared tot he present resolution of about 0.5 arcsec forconventional imaging in good condition. .All the world‘s major telescopes either have adaptive optics or are inthe process of building AO systems. It turns out that a reasonablefraction of the sky can be observed using adaptive optics, withmoderately good imaging quality, provided imaging in done in the nearIR. To move out of the near IR, with its relatively poor angularresolution, astronomers need a laser guide star. There is a layer ofNa atoms at approximately 90 km altitude that can be excited by alaser to produce such a source, or Rayleigh scattering can be employedlower in the atmosphere. But the production and use of laser guidestars is not trivial, and the key issues determining their successfulimplementation are discussed here, including the physics of the Naatom, the cone effect, tilt d | | 出版日期 | Book 2000 | | 关键词 | ASTER; adaptive optics; astronomy; imaging; laser; optics | | 版次 | 1 | | doi | https://doi.org/10.1007/978-94-015-9624-4 | | isbn_softcover | 978-90-481-5492-0 | | isbn_ebook | 978-94-015-9624-4Series ISSN 1389-2185 | | issn_series | 1389-2185 | | copyright | Springer Science+Business Media Dordrecht 2000 |
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发表于 2025-3-21 17:55:54
