Airy disk

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

In collections

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What Wikipedia says

In optics, the Airy disk (or Airy disc) and Airy pattern are descriptions of the best-focused spot of light that a perfect lens with a circular aperture can make, limited by the diffraction of light. The Airy disk is of importance in physics, optics, and astronomy.

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

Image: Bautsch, CC0, via Wikimedia Commons.