Systems and methods using multi-wavelength single-pulse raman spectroscopy
AssigneeUniversity of Maryland, Baltimore County
InventorsBradley ARNOLD, Christopher COOPER, John CATALDI
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Abstract
The invention provides methods and apparatus comprising a laser source that uses a single unfocused pulse of a low intensity but high power laser over a large sample area to collect Raman scattered collimated light, which is then Rayleigh filtered and focused using a singlet lens into a stacked fiber bundle connected to a customized spectrograph, which separates the individual spectra from the scattered wavelengths using a hybrid diffraction grating for collection onto spectra-specific sections of an array photodetector to measure spectral intensity and thereby identify one or more compounds in the sample.
Claims10
A handheld detection device comprising:
- an excitation source configured to provide optical energy in the form of an unfocused laser pulse;
- a detection unit, the detection unit including collection optics and a spectrograph;
- and
- a command-and-control system configured to wirelessly transfer data between an operator and the detection unit;
- a housing enclosing the excitation source, the detection unit, the command-and-control system;
- and
- a handle coupled to the housing,
- wherein the excitation source, the detection unit, and the command-and-control system are configured for Raman spectroscopy.
Dependencies are inferred from the claim text.