Definition of Cassegrain telescope in English:

Cassegrain telescope

Line breaks: Casse|grain tele|scope
Pronunciation: /ˈkasɪgreɪn


  • A reflecting telescope in which light reflected from a convex secondary mirror passes through a hole in the primary mirror.
    More example sentences
    • Visitors can also see the University Observatory, which houses a 14 inch Schmidt Cassegrain telescope with a cooled CCD (Charge Couple Device) camera.
    • The tube length is very long compared to a Cassegrain telescope of the same effective focal length.
    • Easy portability and precision optics are hallmarks of Cassegrain telescopes, and Orion has some of the finest.


late 19th century: named after N. Cassegrain (1625–1712), the French astronomer who devised it.

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a small amount; a little