CPC G01B 11/0625 (2013.01) [G01N 21/3581 (2013.01); G01N 33/32 (2013.01)] | 9 Claims |
1. A sensor for a THz measurement system, the sensor comprising:
a pulsed source of THz radiation adapted to irradiate a sample with a pulse of THz radiation, said pulse comprising a plurality of frequencies in the range from 0.01 THz to 10 THz;
a detector for detecting reflected radiation from the sample, wherein the sensor is configured to determine sensor position information from the radiation reflected from the sample;
a non-THz measurement gauge adapted to measure the position from the sensor to the sample; and
an indicator adapted to indicate when the measurement gauge and the determined sensor position information indicates that the sensor is at a suitable distance for the sensor to make a THz measurement of the sample.
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