The present invention is an optical device for small spot analysis by
diffuse reflectance using fiber optic interfaced spectrometers. The
device comprises a source of electromagnetic radiation and a set of
mirrors designed to project most of the radiation from the said source
onto a less than 1 mm diameter spot on the sample, collect a portion of
the radiation reflected by the sample and refocus this reflected
radiation into an optical fiber. The said optical fiber then brings the
said reflected radiation into a fiber optic interfaced spectrometer for
spectral analysis. A means for the magnified viewing of the sample and
the precise selection of the sampling spot for analysis is integrated
into the invented device. Adding a digital camera and a laser module to
the said device enables nearly simultaneous multimodal analysis of the
same sampling spot by diffuse reflectance, Raman, and fluorescence
spectroscopy and by image analysis.