公开(公告)号：US06636316B1

公开(公告)日：2003-10-21

申请号：US09472251

申请日：1999-12-27

申请人： Koh Matsumoto ,  Jie Dong ,  Hiroshi Masusaki ,  Katsumasa Suzuki

发明人： Koh Matsumoto ,  Jie Dong ,  Hiroshi Masusaki ,  Katsumasa Suzuki

IPC分类号： G01N2100

CPC分类号： G01N21/39 ,  G01N21/3504

摘要： The present invention provides a spectroscopic method for analysing objects in a gas comprising a main ingredient and the objects, both of which the absorption spectra exist in the same wavelength range, with high precision and sensitivity by using a compact and simple single cell system. In accordance with an aspect of the present invention, there is disclosed a spectroscopic method for analysing objects in a sample gas using a laser beam comprising: i) a step of splitting a laser beam into a first laser beam and a second laser beam; ii) a step of transmitting said first laser beam into a sample cell where a sample gas is introduced, and measuring an intensity of a spectrum of said transmitted first laser beam; iii) a step, being performed while performing said step ii), of transmitting said second laser beam into a reference cell where a reference gas is introduced, and measuring an intensity of a spectrum of said transmitted second laser beam, wherein said reference gas comprises an ingredient having at least two spectral lines of which wavelengths in an absorption spectrum of said reference gas are already known; and iv) a step of identifying a wavelength of objects to be measured in said sample gas by comparing said spectrum of sample gas with said spectrum of reference gas using said at least two spectral lines of said reference gas as reference wavelengths.

摘要翻译： 本发明提供一种用于分析气体中的物体的分光方法，其中包括主要成分和物体，两者的吸收光谱都以相同的波长范围存在，通过使用紧凑且简单的单电池系统具有高精度和灵敏度。 根据本发明的一个方面，公开了一种用于使用激光束分析样品气体中的物体的分光方法，包括：i）将激光束分裂成第一激光束和第二激光束的步骤; ii）将所述第一激光束发射到导入样品气体的样品池中并测量所述透射的第一激光束的光谱强度的步骤; iii）在执行所述步骤ii）期间执行将所述第二激光束发射到引入参考气体的参考单元并测量所述透射的第二激光束的光谱强度的步骤，其中所述参考气体包括 具有至少两条光谱线的成分，其中所述参考气体的吸收光谱中的波长已知; 以及iv）通过使用所述参考气体的所述至少两个谱线作为参考波长，通过将所述样本气体的频谱与所述参考气体的频谱进行比较来识别所述样品气体中待测物体的波长的步骤。