Dispersion-based optical coherence tomography OCT measurement of mixture concentrations.
We present a low-coherence technique for the measurement of concentrations in aqueous solutions. It is based on a second-order dispersion measurement using the phase of the Fourier transform of the interferogram term obtained with an unbalanced Michelson interferometer. We demonstrate this approach by concentration measurements of aqueous mixtures of NaCl and glucose solutions. Results show errors between a few percent for high concentrations, up to 31% for low concentrations. The application of such a technique in OCT might require ultrahigh depth resolution and/or other scattered photon rejection techniques.
Bagherzadeh
Seyed Morteza
SM
Division of Medical Physics, Medical University Vienna, Waehringer Strasse 13, A-1090 Wien/Austria.
Grajciar
Branislav
B
Hitzenberger
Christoph K
CK
Pircher
Michael
M
Fercher
Adolf F
AF
D000465:Algorithms; D045424:Complex Mixtures / Q000737:chemistry*; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008027:Light; D009391:Nephelometry and Turbidimetry / Q000379:methods*; D012031:Refractometry / Q000379:methods*; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D041623:Tomography, Optical Coherence / Q000379:methods*; D014867:Water / Q000737:chemistry*
D045424:Complex Mixtures; D014867:Water