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1. (WO2016061247) FLUORESCENCE REMOVAL FROM RAMAN SPECTRA BY POLARIZATION SUBTRACTION
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2016/061247 International Application No.: PCT/US2015/055560
Publication Date: 21.04.2016 International Filing Date: 14.10.2015
IPC:
G01N 21/65 (2006.01) ,G01J 3/44 (2006.01)
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
62
Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
63
optically excited
65
Raman scattering
G PHYSICS
01
MEASURING; TESTING
J
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3
Spectrometry; Spectrophotometry; Monochromators; Measuring colours
28
Investigating the spectrum
44
Raman spectrometry; Scattering spectrometry
Applicants:
ALAKAI DEFENSE SYSTEMS, INC. [US/US]; 8285 Bryan Dairy Road Suite 125 Largo, Florida 33777-1350, US
Inventors:
FORD, Alan R.; US
HOPKINS, Adam J.; US
Agent:
HANSING, Mark D.; US
Priority Data:
62/063,47214.10.2014US
Title (EN) FLUORESCENCE REMOVAL FROM RAMAN SPECTRA BY POLARIZATION SUBTRACTION
(FR) ÉLIMINATION DE FLUORESCENCE DE SPECTRES RAMAN PAR SOUSTRACTION DE POLARISATION
Abstract:
(EN) A method for utilizing polarization as a scheme for fluorescence removal from UV Raman spectra collected in a standoff detection scheme has been invented. In this scheme, a linearly polarized ultraviolet (UV) laser interacts with a material on a surface or in a container. The material generates Raman scattering with polarization contributions relative to that of the laser. The material possibly fluoresces as well, but the fluorescence is generally unpolarized. By subtracting a scaled version of the perpendicular component from the parallel component of the returned signal both relative to the laser source polarization - it is possible to generate a spectrum that is fluorescence free and contains the strongest features of the Raman scattered light.
(FR) La présente invention concerne un procédé pour utiliser la polarisation en tant que mécanisme pour l’élimination de fluorescence de spectres UV Raman collectés dans un schéma de détection à distance. Dans ce schéma, un laser ultraviolet (UV) à polarisation linéaire interagit avec un matériau sur une surface ou dans un récipient. Le matériau génère une diffusion Raman avec des contributions de polarisation relatives à celle du laser. Le matériau peut également émettre une fluorescence, mais la fluorescence est généralement non polarisée. Par soustraction d’une version mise à l’échelle de la composante perpendiculaire à la composante parallèle du signal retourné toutes deux relatives à la polarisation de source laser, il est possible de générer un spectre qui est exempt de fluorescence et contient les composantes les plus intenses de la lumière de diffusion Raman.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)