Crustal Strain Observation Using a Two-Color Interferometer with Accurate Correction of Refractive Index of Air

被引：1
|
作者：
Telada, Souichi [1 ]
Araya, Akito [2 ]
Takamori, Akiteru [2 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, 1-1-1,Umezono, Tsukuba, Ibaraki 3058563, Japan
[2] Univ Tokyo, Earthquake Res Inst, Bunkyo Ku, Tokyo 1130032, Japan
来源：
TECHNOLOGIES | 2014年 / 2卷 / 03期
基金：
日本学术振兴会;
关键词：
two-color interferometer; heterodyne interferometer; refractive index of air; distance measurement; strain observation;
D O I：
10.3390/technologies2030115
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A highly accurate two-color interferometer with automatic correction of the refractive index of air was developed for crustal strain observation. The two-color interferometer, which can measure a geometrical distance of approximately 70 m, with a relative resolution of 2 x 10(-9), clearly detected a change in strain due to earth tides in spite of optical measurement in air. Moreover, a large strain quake due to an earthquake could be observed without disturbing the measurement. We demonstrated the advantages of the two-color interferometer in air for geodetic observation.
引用
收藏
页码：115 / 128
页数：14
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