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

This velocity profile is very similar to the last. It corresponds to an 8 cm-1 acquisition in 1.5 milliseconds. This was meant to be a 4 cm-1 acquisition, but the alignment of the disk mirror was accidentally set for 8 cm-1 operation. Because the mirror travels half as far in half the time, the peak velocity is again very close to 200 cm/s. The mirror was spinning at 20,000 rpm corresponding to 667 scans/second with the laser modulation again exceeding 3 MHz.

 
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