A LASER EARTH STRAIN METER

被引：19
作者：
BERGER, J
LOVBERG, RH
机构：
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 1969年 / 40卷 / 12期
关键词：
D O I：
10.1063/1.1683864
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A laser interferometer for the study of earth strain is described. Changes in the length of an 800 m arm are measured by counting fringes in the interference pattern with a least count of 4×10-10. The output is linear and has a flat response from dc to 1 MHz and a dynamic range of 106. The laser wavelength is controlled by reference to a passive optic resonator contained in a stable environment. The wavelength stability is a few parts in 1010 for periods up to a laser lifetime (∼3000 h). © 1969 The American Institute of Physics.
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页码：1569 / &
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