Grating Selection for Raman Spectroscopy

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A diffraction grating is used to separate polychromatic light into its constituent wavelengths. In a Raman spectrometer diffraction gratings are used to separate the constituent wavelengths of the collected Raman scatter onto different pixels of the CCD camera for detection. All Raman spectrometers will require at least one diffraction grating and will frequently be configured to contain more than one to allow the user optimum grating selection for their samples and excitation wavelength(s).