different between telescope vs collimator

English

Etymology

tele- +? -scope.From Latin t?lescopium, from Ancient Greek ?????????? (t?leskópos, “far-seeing”), from ???? (têle, “afar”) + ?????? (skopé?, “I look at”).

Coined in 1611 by the Greek mathematician Giovanni Demisiani for one of Galileo Galilei's instruments presented at a banquet at the Accademia dei Lincei. Doublet of Telescopium.

Pronunciation

• (UK) IPA^(key): /?t?l?sk??p/
• (US) IPA^(key): /?t?l??sko?p/
• Hyphenation: tele?scope

Noun

telescope (plural telescopes)

1. A monocular optical instrument that magnifies distant objects, especially in astronomy.
2. Any instrument used in astronomy for observing distant objects (such as a radio telescope).
3. (television) A retractable tubular support for lights.
   • 1963, Television Engineering: Report (page 245)

     In some studios the telescopes are fixed to the lighting grid […]

Synonyms

Derived terms

Translations

Verb

telescope (third-person singular simple present telescopes, present participle telescoping, simple past and past participle telescoped)

1. (transitive, intransitive) To extend or contract in the manner of a telescope.
2. (transitive, intransitive) To slide or pass one within another, after the manner of the sections of a small telescope or spyglass.
3. (intransitive) To come into collision, as railway cars, in such a manner that one runs into another.

See also

• binoculars
• microscope

References

• telescope at OneLook Dictionary Search

English

Etymology

collimate +? -or

Noun

collimator (plural collimators)

1. (physics) An optical device that generates a parallel beam of light. Often used to compensate for laser beam divergence.
2. (physics) A similar device that produces a parallel beam of particles such as neutrons.
3. (astronomy) A small telescope attached to a larger one, used to point it in the correct general direction.

Anagrams

• microatoll, mortal coil