Ritchey–Chrétien-távcső

A Ritchey–Chrétien-távcső elvi rajza
Az ELTE 40 centiméteres Ritchey-Chrétien-távcsöve

A Ritchey–Chrétien-távcső (más néven RCT) egy speciális Cassegrain-távcső, melyet George Willis Ritchey és Henri Chrétien fejlesztett ki az 1910-es években.
A távcsőnek mindkét tükre hiperbolikus, szemben a Cassegrain rendszer parabolikus elsődleges tükrével.
Ez a távcsőtípus mentes a kómától és a szférikus aberrációtól és kiemelkedően alkalmas széles látómezejű fotografikus megfigyelésekhez. Magyarországon az MTA Csillagászati Kutatóintézetének piszkéstetői állomásán található egy 1 méteres Ritchey-Chrétien optikai elrendezésű távcső. A hegyhátsáli Hegyháti Csillagvizsgálóban is egy ilyen típusú 50 centiméteres távcső használatos.[1]

Néhány nagyobb Ritchey–Chrétien-távcső

Jegyzetek

  1. ↑ Konkoly Obszervatórium. [2022. január 19-i dátummal az eredetiből archiválva]. (Hozzáférés: 2009. március 23.)
  2. ↑ ESO NTT website. (Hozzáférés: 2009. március 23.)

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