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    • 8. 发明授权
    • Method for contactless characterization of a substance
    • US12031902B2
    • 2024-07-09
    • US17297246
    • 2020-04-07
    • Steinfurth Mess-Systeme GmbH
    • Markus Grafen
    • G01N21/27G01N21/3504G01N21/90
    • G01N21/274G01N21/3504G01N21/90
    • The invention relates to a method for contactless characterization of a substance (A) using waves (W), wherein the substance (A) comprises a spectral structure (a({tilde over (e)}i)) as a characteristic field (KF) which qualitatively depends on at least one property (ei) of the substance (A), wherein the spectral structure (a({tilde over (e)}i)) is recorded by a measurement (x), and wherein the measurement (x) may comprise an interference structure (s) that depends on the measurement circumstances. According to the invention it is provided that in step 1) at least two different measurements (xj) are carried out under different measurement circumstances, which can have quantitatively and/or qualitatively different interference structures (sj) and/or quantitatively different spectral structures (gj·α), and that in step 2) coefficients (cj) of a linear combination




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      of the different measurements (xj) and the value ({tilde over (e)}i) of the at least one property (ei) of the substance (A) are optimized so that the deviation between the linear combination





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      and the spectral structure (a({tilde over (e)}i)) is minimized.