A system for Raman spectroscopy involving synergistic interaction between a computer and spectrometer is described which permits complete point by point flexibility in scanning the spectrum. The interface between the computer and the spectrometer and its operation is described together with the basic characteristics of the computer software to operate it. It is shown that significant improvement can be made in spectrum quality and/or run time when statistical considerations are used to program the operation of the system.
Peripherals and Interfacing Handbook (Digital Equipment Corporation, Maynard, MA, 1973).
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MalmstadtH. V. and EnkeC. G., Digital Electronics for Scientists (W. A. Benjamin, New York, 1969).
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Digital Logic Handbook (Digital Equipment Corporation, Maynard, MA, 1972).
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HamiltonW. C., Statistics in Physical Science (Ronald Press, New York, 1964).
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When the points are “noisy” and close together, a different procedure is used. The last three points are used to provide a three-point smoothed value for the next to last point; the last five points are used to provide a five-point smoothed value for the second to last point; the last seven points are used to provide a seven-point smooth for the third from the last point; the next two points back are also smoothed by the seven point process. Then these five smoothed values are used in Eq. (13) to calculate the curvature.
