Airy disc

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Airy disc

(ār'ē),
the image of a circular blur formed by a distant point source of light on the retina because of diffraction by the edge of the pupillary aperture where the diameter of the image decreases as the aperture increases.

Airy disc

(ār'ē disk)
The image of a circular blur formed by a distant point source of light on the retina because of diffraction by the edge of the pupillary aperture where the diameter of the image decreases as the aperture increases.
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References in periodicals archive ?
have designed and made a periodic optical fiber that guides an approximate Airy pattern as one of the beam guided modes recently; the fiber's attenuation was 11.0 dB/km at 1.55 [micro]m wavelength [24].
This measure is the ratio of intensity between the peak of the aberrated Airy pattern and that of a perfect Airy pattern.
The image that a telescope forms of a point source such as a star is called an Airy pattern. It is made up of a central bright spot - the Airy disk - surrounded by concentric rings of increasingly fainter light.
The image of each flat wavefront segment will be an Airy pattern, but the image in the eyepiece will be the superposition of many such patterns.
Sheer Swiss cotton, paired with lots of white and airy patterns in maritime colors of blue and red had an undeniably beachy feel.