Cassegrain telescope
[ kas-uh-greyn ]
/ ˈkæs əˌgreɪn /
noun Astronomy.
a reflecting telescope in which the light, passing through a central opening in the primary mirror, is brought into focus a short distance behind it by a secondary mirror.
Origin of Cassegrain telescope
1805–15; named after N. Cassegrain, 17th-century French scientist, its inventor
Also called Cas·se·grain·i·an tel·escope [kas-uh-grey-nee-uh n] /ˌkæs əˈgreɪ ni ən/.
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British Dictionary definitions for cassegrain telescope
Cassegrain telescope
/ (ˈkæsɪˌɡreɪn) /
noun
an astronomical reflecting telescope in which incident light is reflected from a large concave paraboloid mirror onto a smaller convex hyperboloid mirror and then back through a hole in the concave mirror to form the image
Word Origin for Cassegrain telescope
C19: named after N. Cassegrain, 17th-century French scientist who invented it
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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