Ritchey–ChrÉTien Telescope

(Astronomical Instrument)

Logo of Ritchey–Chrétien telescope
Astronomical Instrument
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What is Ritchey–Chrétien telescope?

A Ritchey-Chrétien telescope (RCT or simply RC) is a specialized variant of the Cassegrain telescope that has a hyperbolic primary mirror and a hyperbolic secondary mirror designed to eliminate off-axis optical errors (coma). The RCT has a wider field of view free of optical errors compared to a more traditional reflecting telescope configuration. Since the mid 20th century, a majority of large professional research telescopes have been Ritchey-Chrétien configurations; some well-known examples are the Hubble Space Telescope, the Keck telescopes and the ESO Very Large Telescope.

Technology Types

astronomical instrumentdeviceinstrumentinstrumentalitymagnifieroptical devicescientific instrumenttelescopetelescope type


Ritchey ChretienRitchey-ChretienRitchey-ChrétienRitchey-Chretien TelescopeRitchey-Chrétien TelescopeRitchey–ChrétienRitchey–Chretien telescopeRitchky-Chretien optics


Ritchey-Chrétien (cs)Ritchey-Chrétien (it)Ritchey-Chrétien-Cassegrain-Teleskop (de)Télescope Ritchey-Chrétien (fr)Telescopi Ritchey-Chrétien (ca)Telescopio Ritchey-Chrétien (es)Teleskop Ritchey–Chrétien (in)Teleskop Ritcheya-Chrétiena (pl)Система Ричи — Кретьена (ru)مقراب ريتشي كريتيان (ar)リッチー・クレチアン式望遠鏡 (ja)里奇-克萊琴望遠鏡 (zh)

Tech Info

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 — Date merged: 11/6/2021, 1:33:02 PM
 — Date scraped: 5/20/2021, 6:16:28 PM