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Liquid refractometry by the rainbow method

机译:彩虹法液体折光法

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A new method for measuring the refractive index of liquid, proposed in a previous paper [Appl. Opt. 36, 5552-5556 (1997)], has been developed. The minimum deviation of a laser beam deflected by a liquid-filled cylindrical cell was calculated by use of geometric optics. These theoretical results were compared with experimental results, with excellent agreement. As a result, the unknown refractive index of a liquid could be obtained by use of a computer calculation to give a best fit. The computer calculation showed that the sensitivity of the refractometer increases with the cell-wall thickness until total reflection takes place. A small refractive-index difference can be detected within a precision of 1 x 10(-6) by use of a metal-oxide semiconductor linear image sensor. We show how to calibrate the refractometer with pure water at 3.98 degrees C. (C) 1998 Optical Society of America. [References: 16]
机译:在以前的论文中提出了一种测量液体折射率的新方法[Appl。选择。 [第36卷,第5522-5556页(1997)]中的内容。通过使用几何光学器件,计算了由充满液体的圆柱状单元偏转的激光束的最小偏差。将这些理论结果与实验结果进行了比较,吻合得很好。结果,可以通过使用计算机计算来获得液体的未知折射率以给出最佳拟合。计算机计算表明,折光仪的灵敏度随着晶胞壁厚度的增加而增加,直到发生全反射为止。通过使用金属氧化物半导体线性图像传感器,可以在1 x 10(-6)的精度内检测到较小的折射率差。我们展示了如何在3.98摄氏度下用纯水校准折光仪。(C)1998美国光学学会。 [参考:16]

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