Flame tomographic measuring method

TL;DR: In this article, the density values of plural components of an intermediate product produced in an elementary reaction process of combustion instantaneously at the same time by synthesizing laser light beams which match the absorption spectrum wavelength of a body to measured together, putting the light beams into a sheet shape and irradiating the body to be measured with the light beam.

Abstract: PURPOSE: To image and measure the density values of plural components of an intermediate product produced in an elementary reaction process of combustion instantaneously at the same time by synthesizing laser light beams which match the absorption spectrum wavelength of a body to measured together, putting the light beams into a sheet shape and irradiating the body to be measured with the light beams. CONSTITUTION: The laser light beams from dye lasers 12 and 13 are tuned and mixed through a mirror 14, a dichroic mirror 15, a cylindrical lens system 16 and a beam splitter 17 so as to match absorption spectra of plural materials to be measured at the same time, and then the beams are changed from circular section to sheet section, and the body to be measured is irradiated with the beams. Consequently, materials in the section absorb light energy to rise in energy potential from base states to excited states and then return to the original base states in short times to emit fluorescent light. The fluorescent light is observed on a lower-wavelength side than the absorption spectrum wavelength. Those two kinds of the fluorescent light are observed by a high-sensitivity camera device 24 arranged at right angles to the tomographic surface. The fluorescent light beams are separated by an optical filter 18, so simultaneous video formation becomes possible. COPYRIGHT: (C)1991,JPO&Japio