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Sensor device and for determining a physical value










Image Number 17 for United States Patent #8120775.

A sensor device for determining a physical value using a laser, whose emission behavior can be affected by the physical value is described. The laser is arranged to emit at least two concurrent modes lying above a laser threshold and the physical value is determined using a comparison of changes of the at least two modes occurring under the influence of the physical value.








 
 
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