Author
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Barton Ii, Franklin |
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Submitted to: Near Infrared Spectroscopy International Conference Proceedings
Publication Type: Proceedings Publication Acceptance Date: 5/15/2004 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: The history of Near Infrared began in 1800 with Herschel. Herschel conducted experiments to find a way to filter heat from a telescope and demonstrated that there was light radiation beyond what we know as the visible spectrum (figure 1). This discovery was largely ignored for the better part of a century and even longer before modern instruments were used to acquire spectra. In the mid-1950's Wilbur Kaye with Beckman Instruments published three papers, two of which put NIR spectroscopy on a firm footing. These manuscripts described the instrument and the theoretical basis for the spectra in di- and tri-atomic molecules from group theory and selection rules. The NIR region of the electromagnetic spectrum was not viewed as containing relevant structural information. The separation of NIR from MIR was further enhanced with the appearance of commercial instruments combining the visible (VIS) and NIR from companies like Perkin-Elmer and Cary. The rationale was one on getting the most from sources and detectors that were available than of building an instrument which could be used for the whole vibrational spectral region. In reality nothing covered the whole range and still does not. The emergence of NIR into the analytical world as an accepted technique began with the work of Karl Norris of the U.S. Department of Agriculture, Agricultural Research Service in the early 1960's. Karl used the instrument in Figure 2 for almost all of his career which demonstrates the inherent quality of the Cary 14. |
