Astronomy: General

Ramsden eyepiece

A Dictionary of Astronomy | 1997 | Copyright

Ramsden eyepiece A type of eyepiece consisting of two planoconvex lenses of the same focal length with their flat sides facing outwards. Its main advantage is its simplicity and low cost. It has poor eye relief, and suffers from chromatic aberration and spherical aberration, although not coma (see coma, optical). It was invented in 1782 by the English instrument-maker Jesse Ramsden (1735–1800). See also kellner eyepiece.

Cite this article
Pick a style below, and copy the text for your bibliography.

"Ramsden eyepiece." A Dictionary of Astronomy. 1997. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

"Ramsden eyepiece." A Dictionary of Astronomy. 1997. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O80-Ramsdeneyepiece.html

"Ramsden eyepiece." A Dictionary of Astronomy. 1997. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-Ramsdeneyepiece.html

A Dictionary of Earth Sciences | 1999 | | Copyright

Ramsden eyepiece See EYEPIECE.

Cite this article
Pick a style below, and copy the text for your bibliography.

AILSA ALLABY and MICHAEL ALLABY. "Ramsden eyepiece." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Ramsden eyepiece." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O13-Ramsdeneyepiece.html

AILSA ALLABY and MICHAEL ALLABY. "Ramsden eyepiece." A Dictionary of Earth Sciences. 1999. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Ramsdeneyepiece.html

	Microscope Lenses Made Simple.(understanding magnifying lenses)(Brief Article) Magazine article from: R & D; 7/1/1999
	Microscope Lenses Made Simple.(Brief Article) Magazine article from: R & D; 9/1/1999
	Basics of light microscopy: two concepts are necessary to get off to a good... Magazine article from: R & D; 11/1/2001