Most of the current dispersive Raman set-ups are now equipped with multichannel two-dimensional CCD detectors. The main advantages of these detectors are the high quantum efficiency, the extremely low level of thermal noise (when effectively cooled), low read noise and the large spectral range available. Many CCD chips exist, available in front and back-illuminated formats, but one of the most common spectroscopy sensor formats is the back-illuminated 1024 x 256 pixel array, containing 26 x 26 microns.