| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens shape measuring method and apparatus capable of measuring a large lens shape without enlargement in size of the apparatus as a whole. SOLUTION: A measuring element (lens measuring element 36, lens frame measuring element 37) rotatable about a rotation axial line (rotation center O5) and movable forward and backward relative to the rotation axial line in a radial direction is abutted with an inner peripheral surface of a lens frame (RF, LF) that is a lens of spectacles M or an outer peripheral surface of a spectacle lens or a template (lens Lm, i.e. lens ML, MR) that is a lens of spectacles M. While keeping the contact state, the measuring element is moved along the contact surface of the lens in the circumferential direction to measure radiiρi (i=0, 1, 2, ..., n) of the lens that is the change in distance from a geometric center of the lens shape to the measuring element over an entire circumference of the lens shape. The rotation axial line is moved in a measurement region of the lens to a position where the measuring element is capable of measuring the lens shape to thereby cause the measuring element to measure the lens shape for each measurement region. COPYRIGHT: (C)2010,JPO&INPIT
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