| 摘要 |
PURPOSE:To attain the qualitative enhancement of detected data, by allowing laser beams reversely directed to each other to propagate through a rectangular beam path through a beam splitter and taking out the interference beam of both beams by the beam splitter in the beam path to detect the same. CONSTITUTION:The laser beam (GB)2 generated from a laser oscillator 1 is separated into straight advance beam (CW beam)8 and beam (CCW beam)9 bent at a right angle by a beam splitter (BS)3. The CW beam 8 is the component of GB2 straightly advancing through BS3 and propagates along optical fiber OF4 to be incident to BS5 and the CCW beam 9 is the component of GB2 bent to a right angle direction by BS3 and propagates along OF4 to be incident to BS5. The beam bent to a right angle direction among the CW beam 8 and the CCW beam 9 is detected as detection beam 6 by a beam detector 7. By the detection of the detection beam 6, the speed to an inertia space of a flight body or an artificial satellite can be accurately detected.
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