| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To disclose a technique for detecting water vapor in a natural gas background. <P>SOLUTION: This device includes a light source (519) emitting light approximately within wavelength ranges such as 920 to 960 nm, 1.877 to 1.901, or 2.711 to 2.786. The light source emits light which passes through a specimen of natural gas and is detected by a detector (523). In one embodiment, the light source is a tunable diode laser and the moisture level is determined by harmonic spectroscopy. In other embodiments, a VCSEL, a color center laser, or a quantum cascade laser is utilized. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
