Galilean telescope

noun

1. a refracting telescope that forms an erect image, consisting of an objective of relatively long focal length that causes light rays to converge and an eyepiece of short focal length that causes them to diverge.

Galilean telescope

/ ˌɡælɪˈleɪən /

noun

1. a type of telescope with a convex objective lens and a concave eyepiece; it produces an erect image and is suitable for terrestrial use

Word History and Origins

Origin of Galilean telescope¹

First recorded in 1715–25

Example Sentences

After all, their eyes work like little Galilean telescopes.

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It is this simple form of Galilean telescope that is still used in opera glasses and field glasses, because of the shorter tube necessary.

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First, he made a version of the Galilean telescope, the model the famous Italian astronomer used to observe the moon and sunspots.

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An exactly similar principle is adopted in the construction of an opera-glass, which can be accurately described as a double Galilean telescope.

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These telescopes were all made with a convex object-glass and a concave eye-lens, and this type is spoken of as the Galilean telescope.

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