| 摘要 |
PURPOSE:To perform highly accurate measurement, by arranging the light receiving ends of at least a pair or more of light receiving optical fibers at the projecting end of a light projecting optical fiber so that they are closely contacted. CONSTITUTION:Light is emitted from an LED12 and inputted to a light emitting optical fiber 10. Then the light is projected on the surface of a body 2 from a light emitting end 10a. The light is reflected by the surface of the body 2 and received by a light receiving end 11a of each light receiving optical fiber 11. The respective light is converted into electricity by a PIN photodiode 13 and inputted to an output detecting circuit 14. Then, the ratio of detected amounts and the output loss ratio of the light are operated. The values are compared with the data from a memory device 16. The signals indicating the corresponding distance and slant angle are sent to a display 17. Thus the state of arrangement can be determined based on the distance and the slant angle of the body 2. |
