Method and system for multi-pass laser-induced incandescence
| DWPI Title: System for facilitating laser-induced incandescence measurement of soot or particles in e.g. flame, has detection system for outputting data indicative of property of particulate in measurement region based upon incandescence of particulate |
| Abstract: Various technologies for measurement of properties of a particulate suspended in a gas phase via laser-induced incandescence (LII) are described herein. A beam of light can be emitted into a multi-pass optical cell using a laser. The multi-pass optical cell comprises a system of one or more mirrors that repeatedly reflects the beam through a measurement region, stimulating incandescence of particulates present in the measurement region. An LII detection system having a field of view that encompasses the measurement region then receives blackbody or quasi-blackbody radiation emitted by the incandescing particles and outputs data indicative of one or more properties of the particulates in the measurement region. |
| Use: System for facilitating laser-induced incandescence measurement of soot or particles in environments e.g. flames, combustion chambers and atmosphere. |
| Advantage: The multi-pass optical cell effectively increases an area of illumination of the laser without requiring increase in laser's power by repeatedly reflecting the laser back through the measurement region. |
| Novelty: The system has a multi-pass optical cell (506) comprising a first fold mirror (502, 510) i.e. circular mirror, to receive a beam of light emitted from the laser and reflect the beam into a measurement region (511). A second mirror (504) receives the reflected beam of light from the first mirror and reflects the beam back into the measurement region such that the beam causes incandescence of the particulate as the beam passes back into the measurement region. A detection system outputs data indicative of a property of the particulate in the measurement region based upon the incandescence of the particulate in the measurement region. |
| Filed: 8/17/2016 |
| Application Number: US15239634A |
| Tech ID: SD 13985.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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