The instrument can:

• measure the Raman spectra with a spectral resolution of at least 1.5 cm-1-1 in UV (measured as full width at half maximum (FWHM) for the 365.015 nm line of the mercury lamp, using a diffraction grating of 2400 g/mm);
• measure the Raman spectra with a spectral resolution of at least 0.6 cm-1-1 in the visible range (measured as FWHM for the 585 nm of the neon lamp, using a diffraction grating of 1800 g/mm);
• measure the Raman spectra with a spectral resolution of at least 0.3 cm-1-1 in near infrared (NIR) (measured as FWHM for the 837.76 nm line of the neon lamp, using a diffraction grating of 1800 g/mm).

The system has the following laser wavelengths, but also the optical and mechanical configurations for using these lasers:

• 633 nm, 17 mW
• 488 nm, 120 mW
• 514 nm, 120 mW
• 785 nm, 100 mW

The system allows further upgrade with additional lasers wavelengths in the UV, in visible or in infrared (325 nm, 532 nm, 830 nm, 1064 nm), switching between lasers, controlling the intensity of the laser power through the use of neutral density filters (with a motorized swivel support that has 9 positions: 100%, 50%, 25%, 10%, 5%, 2%, 1%, 0.1%, 0.01%), which are controlled by the software, the selection of the diffraction gratings (delivered with 2 diffraction gratings: 600 g/mm and 1800 g/mm, and the selection of rejection filters is completely automatized and software-controlled.

Filters

• The filters are stable in time, being a polymer type and they don’t place artifacts in the spectral measurements (especially at low frequency).
• The filters included in the configuration are Edge filters to provide maximum sensitivity, the filters operate in the mode of injection/rejection; the same filter reflects the light into the microscope and rejects the Rayleigh signal and the scattered light, that is reflected into the spectrometer.
• The filters allow measurements up to 50 cm-1 for visible and NIR (for 488 nm wavelengths, 512 nm, 633 nm, 785 nm) and up to 150 cm-1 in UV (for 325 nm wavelength).