Patent ID: 9212901
Filing Date: 2015-12-15
Classification: G01B,G01M

Abstract:
1. An apparatus for measuring a shape of an aspheric surface of an aspheric element, comprising: a support structure; a moveable stage moveably attached to the support structure; a rotatable base disposed on the movable stage and adapted to rotatably support the aspheric element along an apparatus axis; an interferometric wavefront measurement system operably supported by the support structure and adapted to optically interrogate the aspheric surface with a measurement wavefront to collect wavefront-based measurement data of the aspheric surface; a profile measurement system operably supported by the support structure and adapted to perform at least one non-contact profile-based measurement of the aspheric surface to collect profile-based measurement data of the aspheric surface; and a controller adapted to receive and process the wavefront-based measurement data and the profile-based measurement data to define a combined measurement of the aspheric surface.