| 摘要 |
PURPOSE:to realize the monitoring of the environmental change over a long distance, by using a photoconductor formed by covering the outer circumference of a core with a cladding layer and a environment-sensitive member that senses optically the environmental change, then varies the optical characteristics. CONSTITUTION:A photoconductor 1 formed by covering the outer circumference of a core with a cladding layer is set on a substrate 21 made of quartz, etc. and in a direction where the cut-away face 4 is vertical to the surface of the substrate 21. An environment-sensitive member 22 made of a material which is sensitive to the environmental change such as the temperature, radioactive rays, etc. and has a change of optical characteristics like the wax-type paraffin that changes the light transmittance by the change of temperature is adhered to the face 4. In addition, a reporting means is adhered to the side face of the member 22. In such constitution, the environmental change is monitored over a long distance for a disconnection of the electric power transmission wire, etc. |
