Patent ID: 8258477
Filing Date: 2012-09-04
Classification: G01N,G06K

Abstract:
1. An inspection apparatus for inspecting a subject, comprising: an irradiating unit constructed to irradiate the subject with a terahertz wave; a detecting unit constructed to detect a terahertz wave obtained from the subject; a transforming unit constructed to perform a wavelet transform on a time waveform of the terahertz wave obtained using the terahertz wave detected by the detecting unit, in order to obtain a wavelet expansion coefficient; a selecting unit constructed to select a wavelet expansion coefficient corresponding to a desired spectrum from a plurality of wavelet expansion coefficients which are obtained using a reference object having a characteristic part of a spectrum in a terahertz range and which correspond to a part of a frequency having a characteristic spectrum and which are stored in advance in a memory unit; and a comparing unit constructed to compare values of the wavelet expansion coefficients, which are values of the wavelet expansion coefficient obtained by the transforming unit and the wavelet expansion coefficient obtained by the selecting unit, corresponding to the part of the frequency having the characteristic spectrum.