| 摘要 |
There already do exist refractive measuring devices that can determine properties of liquids. However, all of these systems use complicated optical arrays and cavities to determine the properties, which make them expensive and quite difficult to operate. The prior products use a point source light, usually a LASER light source, with one light receiver, pointed at an angle through what is being measured. The fight then refracts and the receiving device, usually a CCD, determines the shift in the light path.
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