Long-Range Remote Chemical Detection with Compact Spectroscopy System and Low Laser Pulse Energy
Case ID: 18/0024
Executive Summary:
General Description: A long range remote chemical detection system that combines Raman + LIBS spectroscopy into a compact system that is able to perform good quality Raman spectra and LIBS measurements from distances of several hundreds of meters utilizing low laser pulse energy with a detection time of 1 s or less.
Future Directions:
Strengths:
Weaknesses:
Publications:
http://journals.sagepub.com/doi/abs/10.1177/0003702816668531
Inventor Bio: Anupam Misra
https://www.soest.hawaii.edu/soestwp/about/directory/anupam-misra
Executive Summary:
- Invention Type: Diagnostic and Device
- Patent Status: Pending
- Technology Summary Link:
- Research Institute: University of Hawaii, NASA Langley Research Center
- Disease Focus: Environmental Health
- How it works: A spectrometer including Raman and LIBS spectroscopy capabilities that includes a laser source configurable to produce a laser light directable towards a target substance, the laser source having a single wavelength and having sufficient power to cause a portion of the target to emit Raman scattering and sufficient to ablate a portion of the target substance to produce a plasma plume. A separate remote light collector is optically configurable to collect light emitted from the portion of the target emitting Raman scattering and from the portion of the target producing the plasma plume. A filter is optically coupled to the remote light collector to remove reflected light and Rayleigh-scattered light, and a spectroscope is optically coupled to the filter and configured to separate the collected and filtered light into a frequency spectrum comprising a Raman spectrum and a laser-induced breakdown spectrum. Finally, an electronic light sensor is used to record the frequency spectrum.
- Lead Challenge Inventor: Anupam Misra
- Inventors: Anupam Misra, Tayro Acosta-Maeda, John Porter
- Clinical Applications:
- Environmental and public health
- Hazardous chemical detection
- Environmental studies (e.g. monitoring chemical pollution and ocean oil spills)
- Remote detection of minerals, biological materials, water, organics, etc.
- Environmental and public health
General Description: A long range remote chemical detection system that combines Raman + LIBS spectroscopy into a compact system that is able to perform good quality Raman spectra and LIBS measurements from distances of several hundreds of meters utilizing low laser pulse energy with a detection time of 1 s or less.
Future Directions:
- Desirable for homeland security, environmental and NASA planetary exploration programs.
Strengths:
- Compact and optimized for field operation
- Low laser power
- Enables detection from a safe distance
Weaknesses:
- Requires broader verification of efficacy
Publications:
http://journals.sagepub.com/doi/abs/10.1177/0003702816668531
Inventor Bio: Anupam Misra
https://www.soest.hawaii.edu/soestwp/about/directory/anupam-misra