Cassegrain telescope

play
noun Cas·se·grain telescope \ˈka-sə-ˌgrān-\

Definition of Cassegrain telescope

  1. :  a reflecting telescope that has a paraboloidal primary mirror and hyperboloidal secondary mirror, is equivalent in its optical effects to a telephoto lens, and usually has the light brought to a focus through a perforation in the center of the primary mirror

Variants of cassegrain telescope

or less commonly

Cassegrain

or

Cassegrainian telescope

play \ˌka-sə-ˈgrā-nē-ən-\

Origin and Etymology of cassegrain telescope

after Laurent Cassegrain †1693 French priest and teacher credited with its invention


First Known Use: 1806


Seen and Heard

What made you want to look up Cassegrain telescope? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a leading champion of a cause

Get Word of the Day daily email!