The principles of dual-beam FT-IR vibrational circular dichroism (VCD) spectrometry are described. Results from this technique are presented and compared to the results from double modulation FT-IR spectrometry. Performance of dual-beam FT-IR VCD measurements are evaluated for signal-to-noise ratio and optical alignment. The use of Fresnel rhombs for mid-infrared circular dichroism spectrometry is described for the first time.
Wang-Jih Yang, Peter R. Griffiths, and Gabor J. Kemeny, "Vibrational Circular Dichroism Measurements by Optical Subtraction FT-IR Spectrometry," Appl. Spectrosc. 38, 337-343 (1984)