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Smoke and Mirrors: Ultra-Rapid-Scan FT-IR Spectrometry

The data from very-rapid-scan systems will have important differences from conventional FT-IR data. This slides shows that in a conventional system operating at a mirror velocity of 6 cm/s appropriate for an MCT detector, the modulation frequencies of mid-IR radiation will range from 2.5 to 25 kHz, while a HeNe reference laser will be modulated at 100 kHz.

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