| 摘要 |
PURPOSE:To improve the linearity of a light output with respect to displacement, by using a clad material for the optical fiber, and making the ratio of a core diameter with respect to the fiber diameter including the clad material 0.55- 0.65. CONSTITUTION:Light emitted from a light projecting part is inputted to the light receiving part fiber 10 at the rectangular surface of the light receiving multiple fiber 11 and transduced into a voltage by a light receiving element 12. As for light receiving part fiber 10, a single fiber having the clad part, which has a diameter of 0.55-0.65 times the fiber diameter, most desirably 0.596 times the fiber diameter, is used in a bundled shape. |
