Measurement of Two-dimensional Temperature Distribution in Electrolyte Solution using Two-wavelength Raman Imaging

Abstract

A non-intrusive, two-dimensional temperature measurement technique in electrolyte solution was developed by spontaneous Raman imaging. Raman scattering from water molecules was focused on for the temperature measurement, and the temperature was measured by using a calibration curve depicting the correlation between the Raman intensity and temperature. The temperature-sensitive NHB band, which appears due to OH stretching vibration of water molecules, and ν₂ band, which appears due to vending vibration of H₂O, were simultaneously detected by a two-wavelength Raman imaging system which consists of two cameras and two optical filters. By using these two different Raman bands, a spatial distributions measurement of temperature in electrolyte solution was achieved.