New devices, have been developed to generate maps or images of heterogeneous samples using a characteristic Raman frequency line and to obtain the surface distribution of a given compound.Samples are illuminated by a laser beam causing Raman lines of the different substances to be emitted. Different techniques using a triple monochromator or a holographic grating system are described. Several examples of Raman images of heterogeneous samples are presented. Spectroscopy 3 (1975) 3 3 4 3 . All Rights Reserved Copyright 0 1975 by D . Reidel Publishing Company, Dordrecht-Holland
Joiirnal of Raman
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