Beckman IR-7 Infrared Spectrophotometer Modifications
- 1 January 1963
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 34 (1), 88-92
- https://doi.org/10.1063/1.1718132
Abstract
The design, construction, and operation of a fiducial wavenumber marking system for the Beckman IR‐7 infrared spectrophotometer is discussed. The system is activated by the uniform rotation of the main monochromator shaft, and superimposes regularly spaced marks on the recorded spectrum. This modification permits an exact evaluation of the frequency precision and linearity of a spectrophotometer with a cam frequency drive system, as well as the measurement of absolute frequencies with an accuracy of up to ±0.05 cm−1 in the first and second grating orders, and up to ±0.10 cm−1 in the third and fourth orders. A variable scanning speed control circuit and an auxiliary gear train for abscissa expansion are also described.Keywords
This publication has 4 references indexed in Scilit:
- Performance of the Beckman IR-7 Infrared Spectrophotometer 2 Frequency Reproducibility and Accuracy (200–800 cm^−1)Applied Optics, 1962
- Performance of the Beckman IR-7 Infrared Spectrophotometer I Frequency Reproducibility and Accuracy (630–4000 cm^−1)Applied Optics, 1962
- The use of indene for the calibration of small infrared spectrometersSpectrochimica Acta, 1961
- Vibration-rotation structure in absorption bands for the calibration of spectrometers from 2 to 16 micronsJournal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1960