Optical throughput advantage spectrometry

Condition (3) is required to ensure the optical throughput advantage of FT-IR spectrometry, which was described in Section 4.4.1.3 usually, the area of the photosensitive region has a diameter of 1-2 mm. Condition (4) is concerned with an interferometer of the continuous-scan type described in Section 5.2.1.1 infrared radiation incident on the... 

In the absence of fluctuation noise, the multiplex advantage of FT-IR spectrometry over a single-channel dispersive spectrometer with the same optical throughput and efficiency (often referred to as Fellgett s advantage) is given by the square root of the number of resolution elements in the spectrum, M, where M =... 

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