Petzval surface


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Petzval surface

(pets'vahl),
the curved image plane on which any extended linear object is focused by a lens; it is curved toward the edges of a convex lens and away from the edges of a concave lens. See: barrel distortion, pincushion distortion.

Petz·val sur·face

(pets'vahl sŭr'făs)
The curved image plane on which any extended linear object is focused by a lens; it is curved toward the edges of a convex lens and away from the edges of a concave lens
See also: barrel distortion, pincushion distortion

Petzval surface 

The imaginary curved surface upon which images would be formed if curvature of field were the only aberration present. It is the curved surface in which the tangential and sagittal image shells of a point-focal lens coincide. See oblique astigmatism; curvature of field; anastigmatic lens.