PURPOSE: To accurately and rapidly measure the spatial concentration distribution of a solute in a wide solution-mixed system including a salt solution.
CONSTITUTION: When measuring the spatial concentration distribution of a solute in a solution-mixed system, light 1 with two or more wavelengths is used, at the same time, the light 1 is divided into a sample light light path 1 (1c and 1d) and a reference light light path 1 (1e, 1f), a solution-mixed sample 12 is provided in the sample light light path 1 (1c and 1d), the sample light and the reference light after passing through the solution-mixed sample 12 are synthesized to generate interference due to the difference in the light path length between the sample light and the reference light. Therefore, the spatial concentration distribution of the solute can be measured according to the change in interference fringes based on the change in the light path length due to the change in the refractive index of the solute for the concentration and two or more wavelengths.
NAGAOKA TOSHIHARU
KAWASAKI KAZUNORI
MURAMATSU SHOJI
UKO TSUTOMU
NISSAN MOTOR
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