Omega Sensors – Optical Accelerometers for Seismic and Navigation Work
Omega Sensors uses an optical displacement technique based on MEMs to perform highly accurate accelerometer-based measurements for navigation. Most accelerometers use an electrical technique which needs calibration on a frequent basis. The optical technique used by Omega Sensor needs less frequent calibration. They licensed the technology from SPAWAR.
Using an electro-optical technique for measuring displacement, they are able to use MEMS on a very small level without losing any accuracy down to the 1-e-15
Similar to the piezoelectric technique of converting vibration energy into electrical energy, Omega also offers what they call the V-Power which uses MEMS as the vibration sensor.
Their displacement technique provides a high signal to noise ratio of 20 bits or more. Check out the video on this page.