Astronomy:Argunov–Cassegrain telescope
The Argunov–Cassegrain telescope is a catadioptric telescope design first introduced in 1972 by P. P. Argunov.[1][2] All optics are spherical, and the classical Cassegrain secondary mirror is replaced by a sub-aperture secondary corrector group consisting of three air-spaced elements, two lenses and a Mangin mirror (the element farthest from the primary mirror).
Discussion
Argunov systems only employ spherical surfaces and avoid the practical difficulties of making and testing aspheres. However, this benefit is marginal, as it is almost as difficult to make a true zone-free sphere of precise radius of curvature as it is to make an aspheric surface with comparable precision.[citation needed] Further, since multiple surfaces are involved, creating a design with good aberration correction can become very complicated.[3]
See also
References
- ↑ Argunov, P.P. (1972). "Izokhromaticheskie sistemy teleskopov so sfericheskoi optikoi". Astronomicheskij Vestnik 6 (1): 52–61.
- ↑ "Catadioptric telescopes". Sky Gazette. 2016-03-06. https://skygazette.com/2016/03/06/catadioptric-telescopes/. Retrieved 2018-02-19.
- ↑ Sacek, Vladimir. "Catadioptric telescopes". 10.2.1. http://www.telescope-optics.net/catadioptric_telescopes.htm.
Further reading
- Kudzej, I. et al. (2007). "Astronomical observatory at Kolonické Sedlo and its results in variable stars observing.". Odessa Astronomical Publications 20: 100–105. https://www.researchgate.net/publication/228670927.
- Kudzej, I.; Dubovsky, P.A. (December 2010). "One-meter telescope in Kolonica Saddle – 4 years of operation" (PDF). Odessa Astronomical Publications 23: 70–73. Bibcode: 2010OAP....23...70K. https://ui.adsabs.harvard.edu/link_gateway/2010OAP....23...70K/PUB_PDF.
External links
- "Astrokolonica page". http://www.astrokolonica.sk/joomla15/en/charakteristika-ao.html.
- "Astronomical Observatory on Kolonica Saddle". http://www.stso.net/2007/docs/dubovsky.html.
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