| 摘要 |
PROBLEM TO BE SOLVED: To measure the magnitude of an eccentricity of a double-sided aspheric lens with high accuracy but without taking any trouble. SOLUTION: An eccentricity measurement device 10 has a probe 11 and a sensing pin 13, and scans the surface of the lens 31 installed to a jig 12 to measure its shape. The jig 12 has a rotary stage 17 journalled to a support 16 by a rotary shaft 18, and can measure the shape of both the front and rear faces of the lens 31 by turning over the lens 31 by 180°. After measuring the shape of both the faces of the lens 31, intersection point coordinates of each the face to an optical axis are found by an arithmetic part 26. In the arithmetic part 26, processing for correcting the intersection point coordinates to the optical axis is performed on the basis of the eccentricity or the like of the rotary shaft 18 to measure eccentric amounts of two aspheric faces are measured with high accuracy. COPYRIGHT: (C)2006,JPO&NCIPI
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