Patent ID: 7286212
Filing Date: 2007-10-23
Classification: G01B,G01M

Abstract:
1. An apparatus for measuring eccentricity of an aspherical surface in which an amount of eccentricity of an aspherical lens is measured, the apparatus comprising: a first light source unit; a first condenser lens for condensing light rays emitted from the first light source unit in a proximity of a center of paraxial curvature of a first surface to be examined, of the aspherical lens; a first angle changing means for entering the light rays on the first surface, at angles θ1i (i =1, 2, . . . , N) with an optical axis; a holding tool for holding the aspherical lens; a first light-splitting element interposed between the first angle changing means and the holding tool; a first imaging lens for collecting light reflected by the first light-splitting element; a first light-detecting element for detecting a situation of light collected by the first imaging lens; and an arithmetical unit, the arithmetical unit including the processes of: