Raman Imaging on Minerals: Global versus Point Sampling Technique

Details Raman Imaging on Minerals: Global versus Point Sampling Technique Raman Imaging on Minerals: Global versus Point Sampling Technique

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....11790t&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #11790

Computer Science

Scientific paper

Two alternative methods of Raman imaging have been applied to the study of minerals. The point illumination and the wide field illumination techniques were compared. Mixtures of different minerals as well as mixtures of organic and mineral materials were investigated. The benefits and the limitations of each method in the context of an in situ planetary experiment are emphasized. At the laboratory level the global imaging method proved to be faster than the point scanning method, however from the results obtained, it becomes apparent that the fluorescence severly limits the use of global illumination. Furthermore, when imaging is performed at a microscale the global illumination technique appeared to be more sensitve to artifacts arising from scattering effects due to the topography of the investigated surface. For both methods the measurements were performed with the same spectrometer core, an acusto optical tunable filter, which is a component of one of MIRASs alternative designs. (MIRAS - Mineral Investigation by in situ Raman Spectroscopy - a miniaturized Raman design for future planetary or asteroid missions).

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