Astronomy:Chinese Future Giant Telescope
From HandWiki
The Chinese Future Giant Telescope is a proposed optical telescope with a primary mirror that has a 30-meter diameter.[1]
Major characteristics
The Chinese Future Giant Telescope has a primary focal ratio of 1.2. Its primary mirror is segmented with 1020 annular submirrors arranged in 17 concentric annuli. Each segment has average length and width both of 0.8 m. Apart from a conventional Cassegrain focus, four Nasmyth foci on two double-deck platforms on both sides are also present. There is a Coudé focus provided for there interferometric array. The comparatively small secondary mirror is 2.74 m in diameter, which will serve active corrections.[1] Other characteristics include:
- Partial annular submirrors
- One of coude planar mirrors is aspherical; better image quality is obtained from such a system.
- A pair of lens-prisms are used in a wide field of view system. Better image quality is obtained and atmospheric dispersion is corrected.[2]
See also
References
- ↑ 1.0 1.1 Li, Guoping (September 2004). "Preliminary structure design and analysis of the Chinese Future Giant Telescope". Proceedings of the International Society for Optics and Photonics. Astronomical Structures and Mechanisms Technology 5495: 204. doi:10.1117/12.551172. Bibcode: 2004SPIE.5495..204L. http://spie.org/x648.html?product_id=551172.
- ↑ Cui, Xiangqun; Su, Ding-Qiang; Wang, Ya-Nan (2003). "Configuration for Chinese Future Giant Telescope". IAU Joint Discussion (The Smithsonian/NASA Astrophysics Data System) 25. Bibcode: 2003IAUJD...8E..53C.
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