公开(公告)号：US4450356A

公开(公告)日：1984-05-22

申请号：US385490

申请日：1982-06-07

申请人： Edward R. Murray ,  Jan E. van der Laan ,  Arne Rosengreen ,  Robert L. Byer

发明人： Edward R. Murray ,  Jan E. van der Laan ,  Arne Rosengreen ,  Robert L. Byer

IPC分类号： G01N21/39

CPC分类号： G01N21/39

摘要： Gases in the atmosphere are detected remotely using a frequency-mixed CO.sub.2 laser beam formed by passing the beam from a first CO.sub.2 laser through a frequency doubler and then frequency-adding the output to the frequency from a second CO.sub.2 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.

摘要翻译： 使用通过将来自第一CO 2激光束的光束通过倍频器形成的频率混合的CO2激光束来远程检测大气中的气体，然后将输出频率加到来自第二CO 2激光器的频率以获得3 微米区域。 预先选择用于被被检测气体不吸收的该区域中的第一波长通过气体被传送到能够反射光束的物体。 然后传输预先被待检测气体高度吸收的第二波长。 然后通过分别在两个波长处吸收的量的差异来确定气体的存在和数量。