| 摘要 |
An optical fiber curvature measuring method comprising rotatably holding an end of the optical fiber, irradiating two points at a prescribed distance from each other on a side surface of the fiber with a pair of parallel light beams orthogonal to an axial direction, measuring representative positions of scattered and reflected light beams scattered by the side surface as coordinate positions on an axis parallel to the optical fiber axis, calculating a difference between the two coordinate positions, rotating the fiber by a prescribed angle, repeating the calculation of the difference a plurality of times, calculating a positive representative value for amplitude SA from the difference obtained at each angle, calculating curvature from the amplitude SA as a first curvature of a first optical fiber longitudinal position, changing positions of the beams irradiating the fiber in the longitudinal direction, and calculating first to m-th curvatures by repeating this process.
|
