公开(公告)号：US20210231500A1

公开(公告)日：2021-07-29

申请号：US17213869

申请日：2021-03-26

Applicant: UNIVERSITY OF MARYLAND BALTIMORE COUNTY

Inventor： Bradley ARNOLD ,  Christopher COOPER ,  John CATALDI

IPC: G01J3/44 ,  G01J3/18 ,  G02B6/32 ,  G01J3/06 ,  G01J3/28 ,  G02B5/18 ,  G01J3/02 ,  G01J3/36

Abstract: The invention provides methods and apparatus comprising a multi-wavelength 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.