Silicon Audio Low-Noise optical seismometer
|Within Vocab||SeaVoX Device Catalogue|
|Alternative Labels||Silicon Audio optical seismometer|
|Definition||An optical broadband seismometer designed for ocean bottom exploration. The seismometer uses optical interferometry to detect ground movements. This is involves splitting a laser beam along two paths; one reflects off a motion-responsive mirror, and the other a fixed mirror. The difference in distance travelled by each beam is detected by photo-diodes, and ground movements are inferred via different light intensities from the difference in distance travelled by each beam. The system is suited to low-noise applications, and can be used in any orientation due to the stiff springs used. The seismometer can be configured in high-sensitivity, high dynamic range or high velocity modes, with sensitivities of 60 V/g, 15 V/g and 750 V/m/s respectively. The seismometer can detect ground motion as small as 1 femtometre (10^-15 m). Its operating temperature range is from -35 to +75 degC.|
|Has Current Version||1|
||Silicon Audio||Mapping: 1617520|
||Silicon Audio||Mapping: 1617525|
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