Design Considerations for a Portable Raman Probe Spectrometer for Field Forensics
Figure 6
Raman Stokes spectra (uncorrected baseline) of a single sulfur particle (a) interrogated in the focus of the Raman probe on a metal coupon compared to a neat packed sample of sulfur (b). These spectra were recorded using the Headwall/Andor prototype spectrometer, 6 mm × 25 m slit, 200 lines/mm. Both spectra were recorded with 300 mW of 830 nm laser light. The particle spectrum was recorded with a single 1 s exposure. The bulk sample spectrum was recorded with twenty, 0.2 s exposures.
