Patent ID: 8094308

Claim:
A spectrometric analyzing device for analyzing a thin film on a supporting member that is optically transparent to incident light, the device comprising: a light source capable of emitting light to a measurement portion to be measured, at n different angles of incidence, θ n ; a polarizing filter provided between the light source and the measurement portion and shielding an s-polarized component of the light emitted from the light source; a detection unit receiving transmitted light transmitted through the measurement portion, thereby detecting transmission spectra, S; a regression operation unit obtaining an in-plane mode spectrum, S ip , and an out-of-plane mode spectrum, S op , through a regression analysis, by using the transmission spectra, S, detected by the detection unit for the transmitted light at each of the n different angles of incidence from the light source, and by using a mixing ratio, R, of the in-plane mode spectrum, S ip , and the out-of-plane mode spectrum, S op , for each of the angles of incidence, the regression operation unit using a regression formula below: ( s ip s op ) = ( R T ⁢ R ) - 1 ⁢ R T ⁢ S where superscript, T, denotes a transposed matrix and superscript, −1, denotes an inverse matrix, the mixing ratio, R, is expressed by a matrix below: R = C ⁡ ( cos 2 ⁢ θ 1 + sin 2 ⁢ θ 1 ⁢ tan 2 ⁢ θ 1 tan 2 ⁢ θ 1 cos 2 ⁢ θ 2 + sin 2 ⁢ θ 2 ⁢ tan 2 ⁢ θ 2 tan 2 ⁢ θ 2 ⋮ ⋮ cos 2 ⁢ θ j + sin 2 ⁢ θ j ⁢ tan 2 ⁢ θ j tan 2 ⁢ θ j ⋮ ⋮ cos 2 ⁢ θ n + sin 2 ⁢ θ n ⁢ tan 2 ⁢ θ n tan 2 ⁢ θ n ) where C denotes a constant and θ j denotes a j-th angle of incidence among the n different angles of incidence of the light from the light source; and an absorbance spectrum calculation unit calculating an in-plane mode absorbance spectrum, A ip , and an out-of-plane mode absorbance spectrum, A op , of the thin film, based on the in-plane mode spectrum, S ip , and the out-of-plane mode spectrum, S op , which are obtained by the regression operation unit in each of a state in which the thin film is on the supporting member and a state in which no thin film is on the supporting member.