Model No.: Raman Manufacturer: Renishaw/Leica Location: SES, 116B

The Renishaw Raman imaging microscope is fitted with an Argon ion (514.5nm) green laser. The system has a depth resolution of 2 microns and a spatial resolution of 1 micron. The Leica imaging microscope has a video camera, which allows images to be captured and stored as bitmaps. The Raman spectrometer can be operated in two modes either point by point spectral mapping, using the motorised stage, or images from a selected wavelength can be obtained. Most of the scattered light has the same frequency as the laser, however a very tiny amount experiences a frequency shift, which is characteristic of the chemical bonds or molecules present in the material. The analysis of the scattered frequencies gives information on the chemical composition, state, aggregation and even factors such as stress, orientation and temperature. Data is recorded on a CCD camera.