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Measuring the dispersive properties of liquids using a microinterferometer

机译:使用微干涉仪测量液体的分散性能

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Using a single-beam, compact interferometer, we measure the refractive index of liquids in the near IR. This highly compact device relies on a silica capillary with a 50 (mu)m inner diameter: it uses a minimal volume of test liquid, isolates the liquid from the humid atmosphere, has broadband operation, and is inherently mechanically stable. These characteristics, in combination with straightforward data acquisition, make it particularly well-suited for measuring the optical properties in the near IR of a wide range of liquids. Using this refractometer, we measure the refractive index of high-index liquids that are expected to be hydroscopic. The accuracy of the refractometer (+-0.1percent) is demonstrated through measuring the indices of air and pure water. We show that the hydroscopic behavior of the probed liquids has little influence on their optical properties in the near IR.
机译:使用单光束紧凑型干涉仪,我们可以测量近红外液体的折射率。这种高度紧凑的设备依赖于内径为50μm的硅胶毛细管:它使用最小量的测试液体,将液体与潮湿的大气隔离,具有宽带操作能力,并且固有地机械稳定。这些特性与简单的数据采集相结合,使其特别适合于测量各种液体在近红外条件下的光学性能。使用该折光仪,我们可以测量预计会吸湿的高折射率液体的折射率。通过测量空气和纯水的折射率,可以证明折光仪的精度(±0.1%)。我们表明,在近红外条件下,所探测液体的吸湿行为对其光学性能几乎没有影响。

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