Concept
Silicon Audio Low-Noise optical seismometer
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL1595/1/ | |
|---|---|---|
| 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. | |
| Date | 2021-01-19T13:12:27 | |
| Identifier | SDN:L22::TOOL1595 | |
| Note | accepted | |
| Is Version Of | TOOL1595 | |
| version | 1 | |
| Broader | L19:SDNKG17 | sensor_model |
L05:368 | seismometers | |
| Related | L35:MAN0146 | Silicon Audio |
B75:ORG01769 | Silicon Audio | |
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