pincushion distortion


Also found in: Dictionary, Thesaurus, Medical, Legal.
Related to pincushion distortion: Barrel Distortion

pincushion distortion

(pin -kû-shŏn) See distortion.

pincushion distortion

[′pin‚ku̇sh·ən di‚stȯr·shən]
(electronics)
Distortion in which all four sides of a received television picture are concave (curving inward).
(optics)
Aberration in which the magnification produced by an optical system increases with the distance of the object point from the optical axis, so that the image of a square has concave sides.
References in periodicals archive ?
During testing, I detected neither barrel nor pincushion distortion.
Barrel and pincushion distortion can affect a shooter's ability to find a parallax-free position, thinking it some manifestation of parallax.
Stars appeared as pinpoints across the entire field; there wasn't a hint of false color around even the brightest stars; and there was only a touch of pincushion distortion, meaning that round objects won't stretch into ovals as you sweep them across the field.
Under critical examination, the 120 [degrees] Explore eyepiece reveals a modest amount of pincushion distortion.