Ramsden eyepiece


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Ramsden eyepiece

See eyepiece.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

Ramsden eyepiece

[′ramz·dən ′ī‚pēs]
(optics)
An eyepiece consisting of two planoconvex lenses with their plane sides facing outward, having the same power and focal length, and separated by a distance equal to their common focal length.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.