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Schmidt-Cassegrain
Schmidt-Cassegrain
The Schmidt-Cassegrain , invented by Bernhard Schmidt, is similar to the Cassegrain. In this system the parabolic primary mirror is replaced by a spherical mirror, which introduces spherical aberration. This is corrected by a Schmidt corrector plate. This type of telescope has some of the advantages of the refractor (long focal length) and some of the advantages of the reflector (low cost for larger apertures).
Last updated: 05-27-2005 20:34:40
03-10-2013 05:06:04
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details