[[Image:NEOWEB16.png|thumb|550px|Modulating the polarization state of an optical beam passing through an electro-optic crystal.]]
Measurement of electric and magnetic fields has numerous uses and applications in different areas of RF technology. First and foremost, field maps shed light on the physical behavior of RF devices and systems. RF engineers typically use external measurement systems for high frequency characterization. For example, a network analyzer measures the port characteristics of a device. Antennas are usually characterized by their far field radiation patterns. Such external measurements do not reveal much about how signals, fields and waves evolve, build up and propagate inside a device from one port to another, or out into the free space. Just as an oscilloscope probe measures voltages and currents at various points of an electronic circuit, imagine if you could measure electric or magnetic fields at any point inside or around a distributed RF system! That's what NeoScan exactly does for you.
<table>
<tr>
<td>
[[Image:NEOWEB18.png|thumb|600px|Modulating the polarization state of an optical beam passing through an electro-optic crystal.]]
</td>
</tr>
</table>
== Non-Invasive Ultra-Near-Field Scanning ==