Abstract
The measurement of electric fields particularly in constrained spaces has required equipment that can not only be large and physically intrusive but seriously affect the signals it is trying to measure. The creation of Optical Electric Field Sensors has enabled these often delicate signals to be detected and mapped in 3 dimensions.
Press release
The demand for equipment, vehicles and environments to both limit the electromagnetic radiation they produce and their vulnerability to external signals has generated the need for better instruments to measure these signals.
The increasing number of wireless devices requires better aerial characterisation. Based on original work when under the banner of NEC Tokin, Seikoh Giken have continued to develop this technology and have announced their latest Optical Electrical Field Sensors (OEFS).
Using the Pokel effect of LiNbO3 crystals, electric fields modulate a remote fibre delivered laser which is then detected remotely. With a new miniaturised OEFS-S1 version and the slightly larger but very much more sensitive OEFS-NS model, the range is topped with the ultra sensitive resonance type OEFS-RC.
The limited use of metal and the elimination of electrical power in the sensor means the electric field is not distorted by the measurement. The sensor is connected by optical fibres to a compact instrument. BBN International supplies this and other unique Seikoh Giken technology.
For more information visit the web site at http://www.bbnint.co.uk/passive_devices/sensors.asp |