| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus and a method for measuring eccentricity of a lens which measure eccentricity of a tested lens without the rotation of the tested lens during measurement. SOLUTION: The apparatus is provided with a tested lens supporting means for mounting the tested lens with a perfect circular outline and having a cylindrical shape and an inherent coordinate system, an inherent coordinate identifying means for identifying the inherent coordinate system, a three-dimensional location coordinate measuring means for measuring location coordinates of an arbitrary point on the tested lens, and a calculation means for converting the location coordinates measured by the three-dimensional location coordinate measuring means into the inherent coordinate system of the tested lens supporting means and calculating the eccentricity of the tested lens. Since the tested lens does not need to be rotated, an outer diameter can be measured, and it is possible to find a relative location relationship between a central axis calculated from the outer diameter and the aspheric surface axis of an aspheric surface or the curvature center of a spherical surface. COPYRIGHT: (C)2005,JPO&NCIPI
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