It has been demonstrated that the 1000-lines-per-inch Bausch and Lomb plane replica grating can be employed for high-resolution infrared studies anywhere in the region between 1 and 40 µ. In this manner, calibration procedures become simplified in measuring wavelengths relative to the CO standards. A map of the pure rotational lines of the H<sub>2</sub>O molecule along with the vacuum wave numbers of these lines has been presented.
K. NARAHARI RAO, W. W. BRIM, V. L. SINNETT, and RALPH H. WILSON, "Wavelength Calibrations in the Infrared. IV. Use of a 1000-Lines-per-Inch Bausch and Lomb Plane Replica Grating," J. Opt. Soc. Am. 52, 862-865 (1962)