Patent ID: 7468792

Claim:
An evaluation apparatus which evaluates a sample, the apparatus comprising: a light source which irradiates the sample with light; an imaging spectrometer which spectroscopically measures light reflected by the sample and senses an image; a first calculator which obtains amplitude information on an amplitude of a spectral reflectance of the sample based on the image sensed by the imaging spectrometer within a predetermined wavelength range of spectral reflectance spectra obtained by the spectrometer; a memory which holds in advance relationship information representing a relationship between the amplitude information of the spectral reflectance and an absorption coefficient; and a second calculator which obtains an absorption coefficient of the sample based on the amplitude information obtained by the first calculator and the relationship information held in the memory; wherein the relationship information includes information representing a relationship between amplitude information of a spectral reflectance of a sample having a porous layer and an absorption coefficient of the porous layer.