The design of a spectrometer for the observation of infrared vibrational circular dichroism (VCD) is reported. This instrument utilizes f/4 aperture, a minimum of optical elements, and a new electronic data acquisition method to improve the sensitivity of previous dispersive units. The instrument described exhibits a level of sensitivity comparable to that of present Fourier transform (FT) VCD instruments, while avoiding some problems which still persist in FT-VCD.
M. Diem, G. M. Roberts, O. Lee, and A. Barlow, "Design and Performance of an Optimized Dispersive Infrared Dichrograph," Appl. Spectrosc. 42, 20-27 (1988)