Dictionary   FastHealth  Email This!


Rams·den eyepiece

n :  a nearly achromatic optical system that contains two plano-convex lenses with the convex surfaces facing each other and is used esp. in instruments fitted with micrometer wires or a scale
Ramsden, Jesse (1735-1800),
British instrument maker. Ramsden was a pioneer in the early invention and manufacture of precision instruments. He designed improved, highly accurate sextants and theodolites. He introduced the Ramsden eyepiece in 1779.

Published under license with Merriam-Webster, Incorporated.  © 1997-2004.



FastHealth Corporation (Tuscaloosa, Alabama - Tuscaloosa County)