G - Physics – 01 – N
Patent
G - Physics
01
N
343/7, 343/9
G01N 21/27 (2006.01) G01N 21/39 (2006.01) G02B 1/02 (2006.01)
Patent
CA 1200301
FREQUENCY-MIXES CO2 LASER RADAR FOR REMOTE DETECTION OF GASES IN THE ATMOSPHERE Abstract Gases in the atmosphere are detected remotely using a frequency mixed CO2 laser beam formed by passing the beam from a first CO2 laser through a frequency doubler and then frequency-adding the output to the frequency from a second CO2 laser to obtain wavelengths in the 3 micron region. A first wavelength in this region, preselected for nonabsorption by the gases to be detected, is transmitted through the gases toward an object capable of reflecting the beam back. A second wavelength preselected as highly absorbed by the gases to be detected is then transmitted. The presence and quantity of the gases is then determined by the difference in the amount respectively absorbed at the two wavelengths.
426095
Byer Robert L.
Murray Edward R.
Rosengreen Arne
Van Der Laan Jan E.
Gowling Lafleur Henderson Llp
Sri International
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