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Petzval curvature |
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Petzval curvature [′pets·väl ′kər·və·chər] (optics) The axial curvature of the image of a plane object produced by an optical system, equal to the sum over all the optical surfaces in the system ofR(1/n′- 1/n), whereRis the curvature of the surface, andnandn′are the refractive indices before and after the surface. Also known as Petzval sum. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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