| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem wherein a rotation angle control by a frequency sweep mechanism takes too much time, when a high-speed frequency sweep is needed, and there is a problem in accuracy, when conducting wide band, high-accuracy and high-speed terahertz spectral measurements, according to the frequency variation due to the temperature change and component wear of the frequency sweep mechanism and the rotation angle control type, or the like. SOLUTION: This terahertz spectrum measurement device is using a reference light in a means which carries out intensity compensation of terahertz lights T<SB>0</SB>-T<SB>6</SB>, T<SB>S</SB>and a means which takes a standard frequency from the absorption spectrum of a gas cell and then calibrates the measured spectrum frequency in real-time basis. According to this procedure, the terahertz spectrum measurement device can sweep the rotation angle continuously and at a high speed in the predetermined frequency range, by using a smooth analog drive mechanism, or the like. COPYRIGHT: (C)2009,JPO&INPIT
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