pincushion distortion

pincushion distortion
a distortion produced by a lens in which the magnification increases toward the edge of the field. Cf. barrel distortion.
[1890-95]

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Universalium. 2010.

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  • Distortion (disambiguation) — Distortion denotes the alteration of the original shape of an object, image, sound, or waveform. Distortion may also refer to: In science and technology: Distortion (optics), including barrel distortion and pincushion distortion Cognitive… …   Wikipedia

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  • Pincushion — A pincushion (or less commonly pin cushion) is a small cushion, typically 3 5 cm across, which is used in sewing to store pins or needles with their heads protruding so as to take hold of them easily.Pincushions are typically filled tightly, so… …   Wikipedia

  • pincushion — ► NOUN 1) a small pad for holding pins. 2) optical distortion in which straight lines along the edge of a screen or lens bulge towards the centre …   English terms dictionary

  • distortion — 1. In psychiatry, a defense mechanism that helps to repress or disguise unacceptable thoughts. 2. In dental impressions, the permanent deformation of the impression material after the registration of an imprint. 3. A twisting out of normal shape… …   Medical dictionary

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