curvature of field


Also found in: Medical.

curvature of field

(field curvature) A minor aberration of a lens or mirror whereby an object lying in a plane perpendicular to the optical axis produces an image lying not on a plane but on a curved surface. If there is any astigmatism present there will be two curved focal surfaces.

curvature of field

[′kər·və·chər əv ′fēld]
(optics)
Error in the image of a plane object formed on a flat screen by an optical system when the best image lies on a curved surface. Also known as field curvature.
References in periodicals archive ?
A large 23mm diameter glass aspherical lens was also incorporated into the IS-20 DLX, offers two technical advantages: a curvature of field and a degree of comatic aberration that are approximately half those of conventional lenses of equal size.
Spherical aberration and curvature of field are two other things to look for you can find using the Zeiss test chart.
Examining the Nikon we noted no astigmatism, curvature of field, rolling distortion, or pincushion distortion.