Patent ID: 9012833
Filing Date: 2015-04-21
Classification: G01J,G01N

Abstract:
1. A calibration method for calibrating a THz-TDS apparatus that obtains a time waveform of a terahertz wave by detecting the terahertz wave at time intervals, the calibration method comprising the steps of: obtaining a time waveform of a terahertz wave propagating through a calibration sample, by using the THz-TDS apparatus; obtaining a measurement spectrum in a frequency domain by transforming the time waveform of the terahertz wave propagating through the calibration sample; comparing a calibration spectrum of the calibration sample and the measurement spectrum; and changing the time intervals for detection by the THz-TDS apparatus or a time axis of the time waveform obtained by the THz-TDS apparatus on the basis of results of the comparison.