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Using minimum deviation of a secondary rainbow and its application to water analysis in a high-precision, refractive-index comparator for liquids

机译:在高精度,液体折射率比较器中使用次彩虹的最小偏差及其在水分析中的应用

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A new method for measuring the refractive-index difference of a liquid has been developed. The liquid to be measured is contained in a 60-mm-diameter, cylindrical glass cell, and a He-Ne laser light is passed into the cell so that the laser light incidence fulfills the condition of minimum deviation. In this condition, the beam emerging from the cell has a fine interference fringe. The position of the interference fringe is read out as a marker to measure the deflection of the laser light. Directly reading the peak shift of the interference fringe makes it easy to obtain the refractive index difference of the liquid with a fairly high precision of at least 6 ×10↑(-6). Further high precision is potentially expected to be realized by use of an improved data analysis treatment of the overall interference fringe pattern. # 1997 Optical Society of America
机译:已经开发出一种用于测量液体的折射率差的新方法。被测液体被容纳在直径为60mm的圆柱形玻璃池中,并且He-Ne激光进入池中,以使激光入射满足最小偏差的条件。在这种情况下,从像元出射的光束具有良好的干涉条纹。读取干涉条纹的位置作为标记,以测量激光的偏转。直接读取干涉条纹的峰位移,可以容易地以至少6×10↑(-6)的相当高的精度获得液体的折射率差。通过使用对整个干涉条纹图案的改进的数据分析处理,有望实现更高的精度。 #1997美国眼镜学会

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