Barlow lens

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Invention

Domain

Science and technology

Knowledge cost

2

In collections

Nobody has pulled it yet.

What Wikipedia says

The Barlow lens, named after the English physicist and mathematician Peter Barlow (1776–1862), is an optical tube with diverging lens elements that, used in series with other optics in an optical system, increase the effective focal length of an optical system as perceived by all components that are after it in the system.

Excerpt from the Wikipedia article “Barlow lens”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Kapege.de, CC BY-SA 3.0, via Wikimedia Commons.