Standoff explosives detector using deep-uv raman spectroscopy

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(11)

EP 2 420 823 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A1)

(48)	Corrigendum issued on:
	30.05.2012 Bulletin 2012/22

(88)	Date of publication A3:
	22.02.2012 Bulletin 2012/08

(43)	Date of publication:
	22.02.2012 Bulletin 2012/08

(21)	Application number: 11177529.2

(22)	Date of filing: 15.08.2011

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International Patent Classification (IPC):

G01N 21/65^(2006.01)
G01N 33/22^(2006.01)

G01J 3/44^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

17.08.2010 US 374465 P
01.06.2011 US 150757

(71)	Applicant: ITT Manufacturing Enterprises, Inc.
	Wilmington, Delaware 19801 (US)

(72)	Inventors:
	Rezac, Jeromy Bel Air, MD 21014 (US) LaValley, Howard N. Alburquerque, NM 87107 (US) DaRe, Ryan Edward Bristow, VA 20136 (US) Pendall-Jones, James Baltimore, MD 21230 (US)

(74)	Representative: Dreiss
	Patentanwälte Gerokstrasse 1 70188 Stuttgart 70188 Stuttgart (DE)

(54)	Standoff explosives detector using deep-uv raman spectroscopy

(57) A method of performing Raman spectroscopy, and an apparatus for performing the method, including irradiating, with laser light, a trace amount of a target substance disposed on a painted surface, receiving reflected laser light and a Raman return signal from the trace amount of the target substance, processing the Raman return signal using, at least, a spectrograph (100) and camera (110) to obtain a Raman signature for the target substance, and identifying the target substance based on the Raman signature for the target substance and a database of Raman signatures. The laser light wavelength is selected based on a ratio of Raman return signal power to fluorescence power.