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Bridger Photonics - Model DIAL -Pulsed Differential Absorption LiDAR System
Using the fact that each gas absorbs a specific frequency of laser light, pulsed DIAL can determine the concentration of a gas by comparing the returning light from a laser pulse that is absorbed by a gas to a laser pulse that is not absorbed by the gas.
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- Transmit a first laser pulse to the gas with a laser frequency that is known to be absorbed by the gas.
- Transmit a second laser pulse to the gas with a laser frequency that is known to not be absorbed by the gas.
- Determine the concentration of the gas in the beam path by comparing the amount of light returning from the two laser pulses.
- Scan the laser beam to determine gas concentration for all areas and to create imagery.