| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an optical fiber cable enclosed in a metallic tube capable of continuously measuring the temperature from room temperature to a high temperature. SOLUTION: Respective ones of an organic polymer coated optical fiber 3 and a metal coated optical fiber 4 are inserted inside a metallic tube (spiral metallic tube or corrugated metallic tube), so that the measuring temperature range is taken partial change by the organic polymer coated optical fiber 3 and the metal coated optical fiber 4. Thus, an optical fiber cable 1 enclosed in a heat-resistant metallic tube capable of continuously measuring the temperature from room temperature to a high temperature can be obtained.</p> |
