Patent ID: 6912055
Filing Date: 2005-06-28
Classification: G01B,G01M

Abstract:
1. A spherical form measuring and analyzing method for measuring a form of a spherical surface to be inspected by using an interferometer apparatus with a reference lens for spherical surface measurement of said interferometer apparatus, said method comprising the steps of capturing on an imaging plane a plurality of regional interference fringe images corresponding to a partial region of said spherical surface each time said spherical surface is relatively moved with respect to said reference lens by a predetermined amount; by using a relationship among a polar coordinate system of said spherical surface, a planar coordinate system of said imaging plane, and a common coordinate system set so as to be commonly used for a plurality of planar coordinate systems for aperture synthesis, transforming a regional form information item obtained from each of said captured regional interference fringe images into a regional synthesis form information item corresponding to said common coordinate system; and subjecting said regional synthesis form information to aperture synthesis processing so as to determine overall form information of said spherical surface.