barrel distortion

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Related to barrel distortion: Pincushion distortion

barrel distortion

irregular image produced when peripheral magnification is greater than axial magnification. See: Petzval surface.

barrel distortion

outward bowing of gridded straight lines in an image, resulting from lens distortion such that the lateral magnification at the center of the image is greater than that at the edges.

bar·rel dis·tor·tion

(bar'ĕl dis-tōr'shŭn)

Irregular image produced when peripheral magnification is greater than axial magnification.
See: Petzval surface

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References in periodicals archive ?

Zoom lenses tend to produce barrel distortion at wide-angle positions and pincushion distortion at telephoto positions (due to slight changes in distortion characteristics during zooming).

Understanding and choosing optics Part II: how to weed out or accept the undesirable traits

We noted no astigmatism, curvature of field, barrel distortion, or rolling distortion.

We detected no spherical aberration, astigmatism, barrel distortion, or rolling distortion during testing.

Eyes like an eagle

Focusing the scopes on the distant brick wall with its very distinct vertical and horizontal lines, we checked for pincushion distortion (lines bowing in) and barrel distortion (lines bowing out).