公开(公告)号：US3766380A

公开(公告)日：1973-10-16

申请号：US3766380D

申请日：1972-03-24

Applicant: NASA

Inventor： MENZIES R

IPC: G01N21/39 ,  G01N33/00 ,  G01N21/26

CPC classification number: G01N21/39 ,  G01N21/4738 ,  G01N33/0027 ,  G01N2021/1795 ,  G01N2201/0214

Abstract: The presence of selected atmospheric pollutants can be determined by transmitting an infrared laser beam of proper wavelength through the atmosphere, and detecting the reflections of the transmitted beam with a heterodyne radiometer transmitterreceiver using part of the laser beam as a local oscillator. The particular pollutant and its absorption line strength to be measured are selected by the laser beam wave length. When the round-trip path for the light is known or measured, concentration can be determined. Since pressure (altitude) will affect the shape of the molecular absorption line of a pollutant, tuning the laser through a range of frequencies, which includes a part of the absorption line of the pollutant of interest, yields pollutant altitude data from which the altitude and altitude profile is determined.

Abstract translation: 选择的大气污染物的存在可以通过传输适当波长的红外激光束通过大气来测定，并且通过使用部分激光束作为本地振荡器的外差辐射计发射器 - 接收器检测发射光束的反射。 特定污染物及其吸收线强度由激光束波长选择。 当已知或测量光的往返路径时，可以确定浓度。 由于压力（高度）将影响污染物的分子吸收线的形状，通过包括感兴趣污染物的吸收线的一部分频率调谐激光，产生污染物高度数据，高度和 高度剖面确定。