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Cassegrain telescope
[ kas-uh-greyn ]
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.
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
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Word History and Origins
Origin of Cassegrain telescope1
1805–15; named after N. Cassegrain, 17th-century French scientist, its inventor
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Word History and Origins
Origin of Cassegrain telescope1
C19: named after N. Cassegrain, 17th-century French scientist who invented it
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