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Increasing signal to noise ratio in optical spectra obtained by spectrophotometers. An interferometer introduces interference effects into a source light beam. A dual beam configuration splits the source beam having the interference effects into a reference beam and a sample beam. The reference beam interacts with a reference substance and is detected by a reference detector. The sample beam interacts with a sample substance and is detected by a sample detector. An optical spectra of the sample is based on the difference between the detected reference beam and the detected sample beam.
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The Curators of the University of Missouri, St. Louis, MO
Larsen, David W. and Xu, Zhi, "Noise cancellation in fourier transform spectrophotometry" (2011). UMSL Patents. 34.