| 摘要 |
PURPOSE: A device for measuring fine distance using an optical fiber interferometer is provided to reduce measurement error caused by changing a path of interferometer due to change of air flow, temperature and pressure or external vibration. CONSTITUTION: A device for measuring fine distance using the optical fiber interferometer includes a laser light source(210), an optical fiber coupler(230) coupling light emitted from the light source, dividing into lights of the same intensity, transferring to a measuring path and a standard path and coupling reflected light, an optical fiber mirror(250) disposed on the standard path for reflecting light transferred from the optical fiber coupler, an optical fiber polarizing adjustor(240) disposed on the standard path, an optical fiber collimater(260) aligning light transferred from the optical fiber coupler, transferring in a straight line and reflecting reflected light to the optical fiber coupler, a mirror(270) reflecting light transferred from the optical fiber collimater in straight line to the optical fiber collimater, an optical detector(280) for detecting intensity of interference pattern by light generated during the coupling process, and a microprocessor(290) calculating phase of interference pattern in a real time and displaying.
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