Patent ID: 7663122
Filing Date: 2010-02-16
Classification: G01M,G01N,H01M,Y02E

Abstract:
1. A laser analytical instrument for producing fluorescence having a wavelength corresponding to the type of object gas of analysis by exciting the object gas of analysis by laser light and then analyzing the state of the object gas of analysis on the basis of the state of the fluorescence, the laser analytical instrument comprising: laser light generating means for generating a single laser light having a given wavelength and top-hat type power density distribution; a demagnification optical system for emitting the laser light generated by the laser light generating means toward an area where the object gas of analysis exists so as to be condensed into a point in the area where the object gas of analysis exists; a phase conjugation laser transfer optical system provided in an optical path of the laser light from the laser light generating means to the demagnification optical system; and fluorescence analysis means for analyzing the state of the received fluorescence, the received fluorescence being produced from the object gas of analysis in the condensed part of the laser light, wherein, when the object gas of analysis comprises hydrogen, the laser light is imparted with energy that injects 17 electron-volts or higher energy into each of one or more hydrogen molecules of the object gas to cause a multiple photon ionization phenomenon or a multiple photon excitation phenomenon of the one or more hydrogen molecules to produce fluorescence in a visible light region from the one or more hydrogen molecules.