| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for calculating center of sphere capable of calculating quickly and accurately the center of a spherical surface. SOLUTION: This sphere center calculation method calculates a distance from a measuring instrument 10 to the center of a sphere 20, using the measuring instrument 10, the first driving mechanism 11 and the second driving mechanism 12. The sphere center calculation method scans at first a surface of the sphere 20 with a laser beam by the measuring instrument 10, by driving the first driving mechanism 11 while emitting the laser beam, monitors a relation between an intensity of a reflected light beam and a rotation angle around a Y-axis, and stores the rotation angle with the maximum intensity of reflected light beam out of the rotation angles around the Y-axis, as the first rotation angle. Then, the sphere center calculation method scans the surface of the sphere 20 with the laser beam by the measuring instrument 10, by driving the second driving mechanism 12, while emitting the laser beam, monitors a relation between the intensity of the reflected light beam and a rotation angle around an X-axis, and stores the rotation angle with the maximum intensity of reflected light beam out of the rotation angles around the X-axis, as the second rotation angle. The center of the sphere 20 is calculated based on the first rotation angle and the second rotation angle. COPYRIGHT: (C)2009,JPO&INPIT
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