Petzval surface


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Petzval surface

[′pets·väl ‚sər·fəs]
(optics)
A paraboloidal surface on which point images of point objects are formed by a doublet lens whose separation is such that astigmatism is eliminated.
References in periodicals archive ?
They need to ensure the point image falls on the far point sphere (FPS) (and so the FPS and Petzval surface coincide).