APPLICATIONS OF RAMAN-SPECTROSCOPY AND IMAGING TO INDUSTRIAL QUALITY-CONTROL

A Raman microprobe focuses laser light onto a small (micron sized) are a of a sample, and then collects and analyses the Raman scattered ligh t. These systems normally consist of a grating spectrometer coupled to an optical microscope. Generally double or triple grating spectromete rs are used to achieve sufficient rejection of the Rayleigh scattered light. This results in systems that have a low optical efficiency and are not rugged enough for industrial use.