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Huygenian eyepiece
Huygenian eyepiece An eyepiece design invented by C.Huygensc.1662. It consists of two planoconvex lenses with their convex surfaces facing the objective lens. Because of its cheap and simple construction it is often used with small refractors, but will only perform well with large focal ratios. The Huygenian eyepiece suffers from aberrations if used on telescopes faster than about f/10. A variant known as the Mittenzwey eyepiece uses convex meniscus lenses and is usable down to f/8.
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"Huygenian eyepiece." A Dictionary of Astronomy. 1997. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>. "Huygenian eyepiece." A Dictionary of Astronomy. 1997. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O80-Huygenianeyepiece.html "Huygenian eyepiece." A Dictionary of Astronomy. 1997. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-Huygenianeyepiece.html |
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Huygenian eyepiece
Huygenian eyepiece See EYEPIECE.
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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "Huygenian eyepiece." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "Huygenian eyepiece." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O13-Huygenianeyepiece.html AILSA ALLABY and MICHAEL ALLABY. "Huygenian eyepiece." A Dictionary of Earth Sciences. 1999. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Huygenianeyepiece.html |
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