Huygens eyepiece

Huygens eyepiece

noun Optics.
an eyepiece consisting of two plano-convex lenses, the plane sides of which both face the eye.

Origin:
1830–40; named after C. Huygens

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To huygens eyepiece
Collins
World English Dictionary
Huygens' eyepiece (ˈhaɪɡənz)
 
n
physics a telescope eyepiece consisting of two planoconvex lenses separated by a distance equal to half the sum of their focal lengths, which are in the ratio of three to one, and oriented so that their curved surfaces face the incident light
 
[C19: named after Christiaan Huygens (1629--95), Dutch physicist]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature