Method and apparatus for compact spectrometer for multipoint sampling of an object

• US 8,269,174 B2
• Filed: 03/09/2010
• Issued: 09/18/2012
• Est. Priority Date: 07/18/2003
• Status: Active Grant

• Current Assignee: Chemimage Corporation
• Original Assignee: Chemimage Corporation
• Inventors: Gardner, Charles W., Treado, Patrick J., Nelson, Matthew, Schweitzer, Robert
• Primary Examiner(s): Porta, David
• Assistant Examiner(s): Maupin, Hugh H
• Application Number:
  US12/719,904
• Publication Number:
  US 20100213376A1
• Time in Patent Office: 924 Days
• Field of Search: 250/341.8, 250/339.07
• US Class Current: 250/341.8
• CPC Class Codes: G01J 3/02 Details
• CPC Class Codes: G01J 3/0205 Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
• CPC Class Codes: G01J 3/0218 using optical fibers
• CPC Class Codes: G01J 3/0224 using polarising or depolarising elements
• CPC Class Codes: G01J 3/0256 Compact construction
• CPC Class Codes: G01J 3/027 Control of working procedures of a spectrometer; Failure detection; Bandwidth calculation
• CPC Class Codes: G01J 3/0272 Handheld
• CPC Class Codes: G01J 3/0283 using a charging unit
• CPC Class Codes: G01J 3/0291 Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements
• CPC Class Codes: G01J 3/10 Arrangements of light sources specially adapted for spectrometry or colorimetry
• CPC Class Codes: G01J 3/44 Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
• CPC Class Codes: G01N 21/31 Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry G01N21/72 takes precedence
• CPC Class Codes: G01N 21/6456 Spatial resolved fluorescence measurements; Imaging
• CPC Class Codes: G01N 21/6486 Measuring fluorescence of biological material, e.g. DNA, RNA, cells G01N21/6428 takes precedence
• CPC Class Codes: G01N 21/65 Raman scattering

Abstract

A method and a portable device for assessing the occurrence of an agent in a sample. A sample is illuminated with photons emanating from a portable device to produce photons reflected, emitted, or absorbed from a set of multiple points in the sample having a defined geometric relationship. The portable device is used to simultaneously illuminate the sample and analyze the photons reflected, emitted, or absorbed from the set of multiple points using spectroscopic methods, including infrared, fluorescence, and UV/visible. The agent assessed may include a hazardous agent, a chemical agent, a biological agent, a microorganism, a bacterium, a protozoan, a virus, and combinations thereof.

Claims

1. A method comprising the steps of:

(a) illuminating the sample with photons emanating from a portable device to thereby produce photons reflected, absorbed or emitted from a first set of multiple points in the sample wherein the points of said first set of multiple points have a defined geometric relationship;

(b) using said portable device to simultaneously analyze the photons reflected, absorbed or emitted from said first set of multiple points in the sample using infrared spectroscopy wherein said reflected, absorbed or emitted photons are characteristic of the presence or absence of the agent in the sample;

(c) illuminating the sample with photons emanating from the portable device to thereby produce reflected, absorbed or emitted photons from a second set of multiple points in the sample wherein said second set of multiple points corresponds to a point in said first set of multiple points from which said reflected, absorbed or emitted photons are characteristic of the presence of the agent; and

(d) using said portable device to simultaneously analyze the reflected, absorbed or emitted photons from said second set of multiple points in the sample using infrared spectroscopy wherein said reflected, absorbed or emitted photons from said second set of multiple points are characteristic of the presence, or absence of the agent in the sample.

2. The method of claim 1 further comprising the steps of:

(e) illuminating the sample with photons emanating from the portable device to thereby produce reflected, absorbed or emitted photons from a third set of multiple points in the sample wherein said third set of multiple points corresponds to a point in said second set of multiple points from which said reflected, absorbed or emitted photons are characteristic of the presence of the agent; and

(f) using said portable device to simultaneously analyze the reflected, absorbed or emitted photons from said third set of multiple points in the sample using infrared spectroscopy wherein said reflected, absorbed or emitted photons from said third set of multiple points are characteristic of the presence or absence of the agent in the sample.

3. A method comprising the steps of:

(a) illuminating the sample with photons emanating from a portable device to thereby produce photons emitted from a first set of multiple points in the sample wherein the points of said first set of multiple points have a defined geometric relationship;

(b) using said portable device to simultaneously analyze the photons emitted from said first set of multiple points in the sample using florescence spectroscopy wherein said emitted photons are characteristic of the presence or absence of the agent in the sample;

(c) illuminating the sample with photons emanating from the portable device to thereby produce emitted photons from a second set of multiple points in the sample wherein said second set of multiple points corresponds to a point in said first set of multiple points from which said emitted photons are characteristic of the presence of the agent; and

(d) using said portable device to simultaneously analyze the emitted photons from said second set of multiple points in the sample using florescence spectroscopy wherein said emitted photons from said second set of multiple points are characteristic of the presence or absence of the agent in the sample.

4. The method of claim 3 further comprising the steps of:

(e) illuminating the sample with photons emanating from the portable device to thereby produce emitted photons from a third set of multiple points in the sample wherein said third set of multiple points corresponds to a point in said second set of multiple points from which said emitted photons are characteristic of the presence of the agent; and

(f) using said portable device, to simultaneously analyze the emitted photons from said third set of multiple points in the sample using florescence spectroscopy wherein said emitted photons from said third set of multiple points are characteristic of the presence or absence of the agent in the sample.

5. A method comprising the steps of:

(a) illuminating the sample with photons emanating from a portable device to thereby produce photons reflected, absorbed or emitted from a first set of multiple points in the sample wherein the points of said first set of multiple points have a defined geometric relationship;

(b) using said portable device to simultaneously analyze the photons reflected, absorbed or emitted from said first set of multiple points in the sample using UV/visible spectroscopy wherein said reflected, absorbed or emitted photons are characteristic of the presence or absence of the agent in the sample;

(c) illuminating the sample with photons emanating from the portable device to thereby produce reflected, absorbed or emitted photons from a second set of multiple points in the sample wherein said second set of multiple points corresponds to a point in said first set of multiple points from which said reflected, absorbed or emitted photons are characteristic of the presence of the agent; and

(d) using said portable device to simultaneously analyze the reflected, absorbed or emitted photons from said second set of multiple points in the sample using UV/visible spectroscopy wherein said reflected, absorbed or emitted photons from said second set of multiple points are characteristic of the presence or absence of the agent in the sample.

6. The method of claim 5 further comprising the steps of:

(e) illuminating the sample with photons emanating from the portable device to thereby produce reflected, absorbed or emitted photons from a third set of multiple, points in the sample wherein said third set of multiple points corresponds to a point in said second set of multiple points from which said reflected, absorbed or emitted photons are characteristic of the presence of the agent; and

(t) using said portable device to simultaneously analyze the reflected, absorbed or emitted photons from said third set of multiple points in the sample using UV/Visible spectroscopy wherein said reflected, absorbed or emitted photons from said third set of multiple points are characteristic of the presence or absence of the agent in the sample.