Verfahren und Vorrichtung zur Untersuchung von Gasen oder Gasgemischen mittels Laserdiodenspektroskopie

EP 1541990 A UPAB: 20050818 NOVELTY - In a process to determine the concentration of gas within a lamp, the lamp is located between two parabolic mirrors of different radius and focused on the lamp. A laser beam is directed at a first parabolic mirror and then follows an increasingly divergent path as it is reflected back and forth between the mirrors through the lamp. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an assembly for use in the above process, incorporating one or more laser diode light sources or narrow frequency (0.6 mu m to 2.5 mu m) bandwidth following the longest possible route prior to measurement with a spectrometer. The laser beam impinges on the lamp at right angles or as close to right angles as possible. The parabolic mirrors have a copper or gold reflective surface. USE - Used as a laser diode process to determine the concentration of gas within a lamp, bottle, transparent pipe or ampoule. ADVANTAGE - The process is simple and of low cost