curvature of field

American  

noun

Optics.

1. a monochromatic aberration of a lens or other optical system in which the focal surface is curved, the refracted image of an object oriented perpendicular to the axis of the lens lying on a curved surface rather than in a plane perpendicular to the axis.

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Example Sentences

The same holds for the errors depending upon the angle of the field of view, w: astigmatism, curvature of field and distortion are eliminated for a definite value, w*, ``zones of astigmatism, curvature of field and distortion,' attend smaller values of w.

From Project Gutenberg