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Everything about Aperture

Hole or opening through which light travels

In optics, the aperture of an optical system is the hole or opening that primarily limits light propagated through the system. The aperture defines a set of rays from each point on an object that will come to a focus in the image plane. This set of rays, sometimes called a bundle of rays or cone of rays, is mathematically a generalized cone. Wikipedia →

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📖 Definitions

Noun A small or narrow opening, gap, slit, or hole.

Noun A hole which restricts the diameter of the lightpath through one plane in an optical system. The diameter of such a hole which restricts the width of the lightpath through the whole system. For a telescope, this is the diameter of the objective lens.

Noun The diameter of such a hole which restricts the width of the lightpath through the whole system. For a telescope, this is the diameter of the objective lens.

Noun The (typically) large-diameter antenna used for receiving and transmitting radio frequency energy containing the data used in communication satellites, especially in the geostationary belt. For a comsat, this is typically a large reflective dish antenna; sometimes called an array.

🗂️ The subject at a glance

  1. Application
  2. In photography
  3. In biology
  4. Equivalent aperture range
  5. In scanning or sampling
  6. In popular culture

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