Fluid refractive index measuring appts. - transmits light through body with tip of surface of revolution contacting fluid

摘要

The light conductor apparatus is for measuring the refractive index of fluids and determining the mixture-ratios of the fluid components and the fluid temperature. An end-face window of a light conductor has both a radiation source and a photosensitive member coupled to it. A portion of the light conductor's surface has a surface-of-rotation which has a progressively decreasing radius of curvature extending toward a vertex-tip, measuring, surface area. Light which is reflected from the vertex-tip, measuring, surface area to the photosensitive member provides an indication of an unknown refractive index of a fluid adjacent to the vertex-tip, surface area.