Concentration determination apparatus, light absorption coefficient calculation method, concentration determination method, program for calculating light absorption coefficient, and program for calculating concentration
PROBLEM TO BE SOLVED: To provide a concentration determining device reducing influence of noise due to a layer other than a target layer.SOLUTION: The concentration determining device includes: optical path length distribution storage means 102； time-resolved waveform storage means 103； optical path length variation storage means 104； irradiating means 105； light receiving means 106； optical intensity acquiring means 107； optical path length acquiring means 109； optical intensity model acquiring means 110； optical absorption coefficient calculating means 111 for calculating an optical absorption coefficient of any layer on the basis of optical intensity acquired by the optical intensity acquiring means 107, an optical path length of each layer of a plurality of light scattering medium layers acquired by the optical path length acquiring means 109, an optical intensity model acquired by the optical intensity model acquiring means 110 and optical path length variations of each layer of the plurality of light scattering medium layers stored in the optical path length variation storage means 104； and concentration calculating means 113 for calculating a concentration of a target component in any layer on the basis of the optical absorption coefficient calculated by the optical absorption coefficient calculating means 111.
