Cassegrain telescope

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Cassegrain telescope

(ˈkæsɪˌɡreɪn)
n
(Astronomy) 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
[C19: named after N. Cassegrain, 17th-century French scientist who invented it]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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A cassegrain telescope consists of primary and secondary reflecting mirrors.
Compact low weight high gain broadband antenna by polarization-rotation technique for x-band radar
She has an 8in Schmidt Cassegrain telescope which is fixed on the sky from her window and can spot planets and far off galaxies.
Room with a view of the stars
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