SYSTEM AND METHOD FOR PORTABLE RAMAN SPECTROSCOPY

• US 20090219525A1
• Filed: 02/29/2008
• Published: 09/03/2009
• Est. Priority Date: 02/29/2008
• Status: Abandoned Application

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Marcus, Matthew S., Wang, Tzu-Yu, Fritz, Bernard S.
• Application Number:
  US12/040,843
• Publication Number:
  US 20090219525A1
• Time in Patent Office: Days
• US Class Current: 356/301
• CPC Class Codes: G01J 3/02 Details
• CPC Class Codes: G01J 3/0208 using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
• CPC Class Codes: G01J 3/0213 using attenuators
• CPC Class Codes: G01J 3/0264 Electrical interface; User interface
• CPC Class Codes: G01J 3/0272 Handheld
• CPC Class Codes: G01J 3/0278 Control or determination of height or angle information for sensors or receivers
• CPC Class Codes: G01J 3/0289 Field-of-view determination; Aiming or pointing of a spectrometer; Adjusting alignment; Encoding angular position; Size of measurement area; Position tracking
• CPC Class Codes: G01J 3/44 Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
• CPC Class Codes: G01N 2021/1793 Remote sensing
• CPC Class Codes: G01N 21/65 Raman scattering
• CPC Class Codes: G01N 2201/0221 Portable; cableless; compact; hand-held

Abstract

One embodiment includes a method that includes scanning a plurality of specimens with a laser by moving the laser according to coordinates for laser movement and measuring a distance for each of the plurality of specimens, associating location information with each of the specimens of the plurality of specimens based on its distance from the laser and its coordinates for laser movement, recording a Raman spectrum for the plurality of specimens, associating a Raman spectrum with each specimen of the plurality of specimens and indicating a Raman spectrum and location information for at least one specimen.

Claims

1. A method, comprising:

scanning a plurality of specimens with a laser by moving the laser according to specified coordinates for laser movement and measuring a distance to each of the plurality of specimens from the laser source;

associating location information with each of the specimens of the plurality of specimens based on its distance from the laser and its coordinates for laser movement;

recording a Raman spectrum for each of the plurality of specimens;

associating a Raman spectrum with each specimen of the plurality of specimens; and

indicating a Raman spectrum and location information for at least one specimen.

2. The method of claim 1, further comprising associating the Raman spectrum with a composition and indicating the composition of the specimen.

3. The method of claim 1, further comprising recording the Raman spectrum by exciting the specimen with the laser.

4. The method of claim 1, further comprising indicating a map including a plurality of specimens and respective composition and location information for each specimen.

5. The method of claim 4, further comprising recording an image of one or more specimens and indicating the image.

6. The method of claim 1, further comprising adjusting the Raman spectrum by adjusting at least one of a group including collection optics, focusing optics, laser power of the laser, slit width, integration time of a photo-detector and signal averages.

7. The method of claim 1, further comprising scanning an area around a specimen, recording a plurality of Raman spectrum during the scan, and indicating a composition based on a statistical analysis of the plurality of Raman spectrum.

8. The method of claim 1, further comprising positioning the laser in a specified an area via a self-powered vehicle.

9. The method of claim 1, further comprising automatically scanning the plurality of specimens according to predetermined coordinates for laser movement.

10. The method of claim 1, further comprising manually controlling the scanning and indicating a Raman spectrum and corresponding location for each specimen concurrent to the manual control.

11. The method of claim 10, further comprising displaying a picture of the specimen concurrent to the manual control.

12. The method of claim 11, further comprising displaying a visible laser incident unto the specimen.

13. An apparatus, comprising:

a Raman spectrometer to measure a Raman spectrum of at least one of a plurality of specimens;

a distance measuring device coupled to the Raman spectrometer to optically determine distance to the at least one specimen;

a scanning mechanism coupled to the Raman spectrometer to align the Raman spectrometer and the distance measuring device with each of the plurality of specimens; and

an interface to display a location and a Raman spectrum for the at least one specimen.

14. The apparatus of claim 13, further comprising a composition information circuit coupled to Raman spectrometer to associate the Raman spectrum with a specified composition.

15. The apparatus of claim 13, wherein the scanning mechanism includes a gimbal.

16. The apparatus of claim 13, further comprising a battery to power the Raman spectrometer, the distance measuring device, the scanning mechanism and the interface, with the Raman spectrometer, the distance measuring device, and the battery each disposed in a housing.

17. An apparatus, comprising:

a Raman spectrometer, comprising;

a laser;

a slit coupled to the laser and aligned with a laser path of the laser;

a grating aligned with the laser path of the laser;

a photo-detector array aligned with the laser path of the laser; and

optics aligned with the laser path of the laser; and

an interface to display a location and a Raman spectrum for at least one specimen;

a range finding laser that is visible coupled to the Raman spectrometer to optically determine distance to the at least one specimen; and

a housing and a battery to power the Raman spectrometer, the range finding laser, and the interface, with the Raman spectrometer, the distance measuring device, and the battery each disposed in the housing.

18. The apparatus of claim 17, wherein the laser includes an ultraviolet laser.

19. The apparatus of claim 17, wherein the housing is coupled to a scanner to position the housing in alignment with a plurality of specimens including the at least one specimen.

20. The apparatus of claim 17, further comprising a collimating lens aligned with the path of the laser.