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Appl Opt. 1995 Dec 01;34(34):8053-4. doi: 10.1364/AO.34.008053.

Lens curvature measurements by shadow projection profilometry.

Applied optics

D P Hamblen, M R Jones

PMID: 21068905 DOI: 10.1364/AO.34.008053

Abstract

A technique is described for measuring spherical and aspherical lens curvature independent of surface contact or dependence on surface smoothness. The shadow of a lens profile is projected onto a CCD pixel array, and its silhouette edge-traced by computer video-image analysis. Nonlinear regression analysis, with correction for axial tilt, calculates lens curvature.

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