Herschelian Telescope


Also found in: Dictionary, Thesaurus, Wikipedia.
Related to Herschelian Telescope: Reflector telescope
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Herschelian Telescope

 

a reflector designed by W. Herschel (1789), in which a concave parabolic mirror is inclined toward an incoming pencil of rays in such a way that the image is formed outside this pencil. The Herschelian telescope does not screen the rays, but it has aberrations. A similar system was proposed by M. V. Lomonosov in 1762.

N. N. MIKHEL’SON

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.