Appl Opt. 1995 Dec 01;34(34):8053-4. doi: 10.1364/AO.34.008053.
Applied optics
D P Hamblen, M R Jones
PMID: 21068905 DOI: 10.1364/AO.34.008053
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.