This calibration method, developed for a Perkin-Elmer Model 12 spectrometer, covers the regions 5 to 15µ (NaCl) and 2 to 5µ (LiF). Standardized techniques lowered the standard deviation of the spectrometer itself to 0.10 cm-1 at 1000 cm-1. The formula Ti = T0+ (a/νi2 - ν02) is shown to be analogous in form and method of solution to the Hartmann dispersion formula, λi=λ0+(c/d0-di). Thus Hartmann formula techniques have been applied to the calibration equation. Solutions are readily handled on a calculating machine; graphical interpolations are obviated. The results have standard deviation of 0.28 cm-1 at 1000 cm-1.
W. L. ROSS and D. E. LITTLE, "A Method of Calibrating an Infrared Prism Spectrometer," J. Opt. Soc. Am. 41, 1006-1010 (1951)