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]

Translations

telescopio de Cassegraintelescopio Cassegrain

Cassegrain telescope

A compound reflecting telescope designed, according to some sources, by a French sculptor, Sieur Guillaume Cassegrain, in 1672. Others attribute its invention to a 17th-century astronomer known to us only as N. Cassegrain. It is similar to the Gregorian telescope but has a secondary mirror with a convex hyperboloid shape mounted inside the focal plane of the primary mirror. The telescope has a small field, limited mainly by coma, but is compact, portable, and easily mounted and thus very popular. Most large modern reflectors include this facility. See Cassegrain configuration; catadioptric telescope; Ritchey–Chrétien optics; Schmidt telescope.

Cassegrain telescope

[kas·gran ′tel·ə′skōp] (optics) A reflecting telescope in which a small hyperboloidal mirror reflects the convergent beam from the paraboloidal primary mirror through a hole in the primary mirror to an eyepiece in back of the primary mirror.

单词	cassegrain telescope
释义	Cassegrain telescope 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] Translations telescopio de Cassegraintelescopio Cassegrain Cassegrain telescope Cassegrain telescope A compound reflecting telescope designed, according to some sources, by a French sculptor, Sieur Guillaume Cassegrain, in 1672. Others attribute its invention to a 17th-century astronomer known to us only as N. Cassegrain. It is similar to the Gregorian telescope but has a secondary mirror with a convex hyperboloid shape mounted inside the focal plane of the primary mirror. The telescope has a small field, limited mainly by coma, but is compact, portable, and easily mounted and thus very popular. Most large modern reflectors include this facility. See Cassegrain configuration; catadioptric telescope; Ritchey–Chrétien optics; Schmidt telescope. Cassegrain telescope [kas·gran ′tel·ə′skōp] (optics) A reflecting telescope in which a small hyperboloidal mirror reflects the convergent beam from the paraboloidal primary mirror through a hole in the primary mirror to an eyepiece in back of the primary mirror. MedicalSeetelescope
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