Boxman R L, Shlien D J
School of Engineering, Tel Aviv University, Tel Aviv, Israel.
Rev Sci Instrum. 1978 Jun;49(6):861. doi: 10.1063/1.1135630.
A technique for measuring the variation of refractive index of a liquid as a function of temperature or solute concentration using a Mach-Zender interferometer is described. The principal difficulty of obtaining a uniform temperature along the optical path in the sample liquid while simultaneously varying the temperature at a reasonable rate is overcome by heating the liquid in a separate vessel and injecting the heated fluid into the test vessel as a series of jets to encourage turbulent mixing. An equivalent resolution in the refractive index variation of 2x10(-6) was obtained. The above method was used to determine the variation of refractive index in a 0.1% NaCl/H(2)O solution in the temperature range 23 degrees -33 degrees C.
描述了一种使用马赫-曾德尔干涉仪测量液体折射率随温度或溶质浓度变化的技术。通过在单独的容器中加热液体，并将加热后的流体以一系列射流的形式注入测试容器以促进湍流混合，克服了在合理速率下改变温度的同时在样品液体的光路上获得均匀温度的主要困难。获得了2×10⁻⁶的折射率变化等效分辨率。上述方法用于确定0.1% NaCl/H₂O溶液在23℃至33℃温度范围内的折射率变化。
