Patent ID: 8493057

Claim:
An electromagnetic wave measurement device comprising: an electromagnetic wave outputter that outputs an electromagnetic wave having a frequency equal to or more than 0.01 THz and equal to or less than 100 THz toward a device under test; an electromagnetic wave detector that detects the electromagnetic wave which has transmitted through the device under test; a relative position changer that changes a relative position of an intersection of an optical path of the electromagnetic wave transmitting through the device under test and the device under test, with respect to the device under test; a characteristic value deriver that derives a characteristic value of the electromagnetic wave based on a detection result of the electromagnetic wave detector, the characteristic value being associated with an assumed relative position, which is the relative position when it is assumed that the electromagnetic wave is not refracted by the device under test; a measured point corrector that changes the assumed relative position to an actual relative position, which is the relative position when the refraction of the electromagnetic wave by the device under test is considered, to associate the result derived by the characteristic value deriver with the actual relative position; and a corrected characteristic value deriver that derives the characteristic value associated with a predetermined relative position based on an output from the association corrector.