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

The resulting spectrum has a SNR of over 1000:1 by the RMS method. The mirror was stuck to an aluminum rotor mounted on an obsolete 40-megabyte disk-drive spindle, and the rotation was driven by a rubber band. Because the rotating assembly was unbalanced and the disk-drive spindle was flexible, the mirror was vibrating as well as rotating.

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