The optimization of the optical scheme design of a mode-mismatched dual-beam thermal-lens spectrometer for differential (dual-cell) measurements in a far-field mode using diffraction thermal-lens theory is carried out. A criterion for an expert estimation of the quality of the spectrometer design for differential thermal-lens measurements in analytical chemistry (sensitivity, low limits of detection, and quantification) is also developed. The theoretical calculations agree well with previous papers on differential thermal lensing.
View Article and Find Full Text PDF