Fig. 7.

(a) Measured resolution of the Raman systems using the $1085{\mathrm{cm}}^{-1}$ peak of calcite. Device 1 and 3 have fixed slit widths of 50 and $100\mu \mathrm{m}$, respectively, while Device 2 has a variable slit that was set to $100\mu \mathrm{m}$. (b) Calcite spectra recorded with Device 2 at different slit width settings.