Abstract

Modifications affecting the resolution and frequency calibration capability of the Beckman IR-9 infrared spectrophotometer are described and discussed. Under favorable conditions these modifications enable the instrument to be calibrated with an absolute accuracy of 0.03 cm⁻¹ or better; resolution is also improved so that spectral slitwidths may be reduced by approximately √2 over normal specifications. These results are illustrated with vibration-rotation spectra from NH₃, CH₄, and HBr.

Performance of the Beckman IR-7 Infrared Spectrophotometer I. Frequency Reproducibility and Accuracy (630–4000 cm⁻¹)

Peter J. Krueger
Appl. Opt. 1(4) 443-453 (1962)

Performance of the Beckman IR-7 Infrared Spectrophotometer 2. Frequency Reproducibility and Accuracy (200–800 cm⁻¹)

Peter J. Krueger
Appl. Opt. 1(5) 621-625 (1962)

Performance of the Beckman DK Spectrophotometer

Lee Cahn and B. D. Henderson
J. Opt. Soc. Am. 48(6) 380-387 (1958)

The Effect of a Helium Atmosphere on the Beckman Infrared Spectrophotometer*

Wallace R. Brode, John H. Gould, and George M. Wyman
J. Opt. Soc. Am. 43(11) 969-970 (1953)

Transmission Measurements with the Beckman Quartz Spectrophotometer

Kasson S. Gibson and Margaret M. Balcom
J. Opt. Soc. Am. 37(8) 593-608 (1947)