Patent ID: 8481938
Filing Date: 2013-07-09
Classification: G01N

Abstract:
1. 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 and a container storing at least a part of the 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 at which an optical path of the electromagnetic wave transmitting through the device under test and the device under test intersect with respect to the device under test; a delay period recorder that records a delay period of the electromagnetic wave caused by a transmission of the electromagnetic wave through the container; a phase deriver that derives, based on a detected result by the electromagnetic wave detector, a phase in the frequency domain of the electromagnetic wave which has transmitted through the device under test; a delay-corrected phase deriver that derives a delay-corrected phase obtained by subtracting an integral of the delay period with respect to the frequency from the phase; a sinogram deriver that derives a sinogram based on a derived result by the delay-corrected phase deriving unit deriver; and an image deriver that derives, based on the sinogram, an image of a cross section of the device under test including the intersection.