cassegrain telescope: meaning, definition, pronunciation and examples
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Quick answer
What does “cassegrain telescope” mean?
A reflecting telescope with a concave primary mirror and a convex secondary mirror that reflects light back through a hole in the primary mirror to the eyepiece, resulting in a compact optical path.
Audio
Pronunciation
Definition
Meaning and Definition
A reflecting telescope with a concave primary mirror and a convex secondary mirror that reflects light back through a hole in the primary mirror to the eyepiece, resulting in a compact optical path.
A specific and common design for astronomical telescopes and satellite communication dishes, prized for its folded optical path which allows for a long focal length in a physically short tube.
Dialectal Variation
British vs American Usage
Differences
Spelling and pronunciation are consistent. 'Cassegrain' is occasionally spelled 'Cassegrainian' as an adjective, but the noun form is standard.
Connotations
Identical technical connotations in both regions.
Frequency
Equally low frequency and highly specialized in both dialects.
Grammar
How to Use “cassegrain telescope” in a Sentence
The [observatory] uses a [size/adjective] Cassegrain telescope.A Cassegrain telescope [has/features] [optical characteristic].Vocabulary
Collocations
Examples
Examples of “cassegrain telescope” in a Sentence
adjective
British English
- The Cassegrain configuration is very popular.
American English
- We need a Cassegrain-style mount for this.
Usage
Meaning in Context
Business
Rare, except in the business of manufacturing or selling astronomical equipment.
Academic
Common in academic papers and textbooks on astronomy, astrophysics, and optical engineering.
Everyday
Virtually non-existent in everyday conversation.
Technical
Standard term in optical engineering, astronomy, and satellite technology.
Vocabulary
Synonyms of “cassegrain telescope”
Strong
Neutral
Weak
Vocabulary
Antonyms of “cassegrain telescope”
Watch out
Common Mistakes When Using “cassegrain telescope”
- Misspelling as 'Cassegrane', 'Cassegrin', or 'Cassegrainian'.
- Using it as a general term for any telescope.
- Incorrect capitalization ('cassegrain telescope').
FAQ
Frequently Asked Questions
It is named after Laurent Cassegrain, a French Catholic priest, though its invention is also sometimes attributed to other 17th-century figures like James Gregory.
No, a Schmidt-Cassegrain is a specific subtype that incorporates a correcting lens (Schmidt corrector plate) at the front to address spherical aberration, making it a catadioptric system.
Its compact, sealed tube makes it portable, relatively maintenance-free, and suitable for a wide range of observational purposes.
No, it is exclusively a noun (as part of the compound noun) or an adjective (e.g., Cassegrain design).
A reflecting telescope with a concave primary mirror and a convex secondary mirror that reflects light back through a hole in the primary mirror to the eyepiece, resulting in a compact optical path.
Cassegrain telescope is usually technical in register.
Cassegrain telescope: in British English it is pronounced /ˈkæsɪɡreɪn ˈtɛlɪskəʊp/, and in American English it is pronounced /ˈkæsɪɡreɪn ˈtɛləskoʊp/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Imagine a telescope that CASES the light in (Casse-) and then sends it back out the GRAIN (grain) of the main mirror's hole.
Conceptual Metaphor
A folded path (like a compact, efficient journey for light).
Practice
Quiz
What is the primary advantage of a Cassegrain telescope design?