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Table 3 Effects of laser power on the Raman spectral match quality and signal-to-noise ratio for CA

From: Determination of the polymer composition of mid-twentieth century purses by Raman spectroscopy

Laser power (%)a Correlation match quality (%) Signal-to-noise ratiob (1729 cm−1 peak)
100 98.1 120
80 98.0 108
60 97.9 68
40 97.1 48
20 91.0 32
10 27.0 16
  1. aFull laser power (100%) is approximately 200 mW
  2. bSignal-to-noise ratio = \(\frac{{\overline{E}}}{s}\) where \(\overline{E}\) is the mean value of the peak height and s is the standard deviation of the noise measured along a flat portion of the baseline, 2300–2500 cm−1. See Fig. 5