About Dispersive Raman
Dispersive Raman instruments separate collected Raman scattered light into individual wavelengths by focusing the Raman signal on a grating, which spatially separates the different wavelengths. This spatially dispersed beam is directed
to a charge coupled device (CCD).
Dispersive Raman usually employs visible laser radiation. One advantage of using shorter wavelength lasers is the enhancement in Raman signal that occurs at shorter wavelengths. It is advantageous to couple the strength and flexibility of Raman spectroscopy with a microscope that allows analysis of very small samples.
The goal of microscopy is to analyze the smallest samples possible and to distinguish the substance of interest from its surroundings. This is known as spatial resolution and in microscopy, the highest spatial resolution is attained using small pinholes or "apertures" somewhere in the microscope.
Also see Raman Spectroscopy |
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