DUV Raman/PL 200 is a more traditional, but still miniature, deep UV Raman and fluorescence spectrograph employing a TE cooled back thinned, back illuminated CCD array detector.
Deep UV excited Raman & photoluminescence spectroscopy is an emerging analytical instrument technology with vast potential for a wide range of commercial, industrial, and research applications. A major limitation of Raman spectroscopy conducted in the near UV, visible, or near IR is obscuration or interference of the Raman signals due to background fluorescence from the analyte or its background or surroundings within the laser beam interrogation spot. This interference limits the types of materials and compositions or backgrounds for which Raman spectroscopy is useful.
Native fluorescence is a phenomenon which does not occur below about 270 nm for the vast majority of materials, independent of excitation wavelength. Raman, on the other hand, is dependent on excitation wavelength and when excitation occurs below 250 nm, there exists a spectral region within which to observe over 3000 cm-1 of Raman shifted emissions without obscuration or interference from fluorescence.
The DUV Raman/PL 200 provides most of the benefits capability of deep UV Raman and fluorescence systems costing 5 times more and drawing 10kW or more. Raman resolution is 8 cm-1. Fluorescence resolution is 0.6 nm.
This instrument has options for LN2 and LHe sample cooling stages as well as motorized XY mapping stages with submicron resolution.
248.6nm Excitation, Random Polarization
Raman signatures insensitive to polarization of target materials
200cm Czerny Turner with dual computer controlled 4200 and 600 g/mm holographic gratings
<8 cm-1, 75um slit
3 stage TE cooled, back illuminated UV CCD array
Photon Systems focuses on explosives detection using the combination of deep UV native fluorescence and Raman spectroscopy using deep UV sources that enable compact, low power consuming devices
Real-time, in situ, assessment of suspicious powders and substances on surfaces is an important capability needed by war-fighters and first responders. It is also important to be able to perform these assessments without contact with the suspicious substance or use of reagents.
The increasing trend of document fraud has led to the requirement for more efficient forensic investigation techniques for document forgery detection. Raman spectroscopy is a desirable technique for the analysis of inks used in document forgery because it allows easy and fast analysis with chemical selectivity.
A major challenge in the fingerprint analysis community is to address the use of a non-contact, non-invasive, non-destructive method. Deep UV native fluorescence imaging translates well to fingerprint detection and morphological analysis.
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1512 Industrial Park St. Covina, CA 91722-3417