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Infrared Emission Spectroscopy: A New Accessory

The principal problem in measurement of emission IR spectra is the low signal to noise ratio resulting from the large background radiation. One method of increasing the signal is to collect the emitted radiation over a very large solid angle using an ellipsoidal mirror. In this method, placing the sample at the short focal length of the ellipsoid both increases the amount of radiation collected for an improved signal to noise ratio as well as facilitates sampling of small areas. For locating the area of interest, a microscope is mounted on the emission accessory.