英语翻译
A method for refractometer measuring,in which a beam of rays emitted from a light source is transmitted to the interface between the optical window of a refractometer and the liquid to be measured,whereby part of the beam of rays is reflected back from the liquid and part is absorbed into the liquid and an image is produced in which the position of the boundary between a light and dark area depends on the critical angle of total reflection,the critical angle being a function of concentration of liquid,and in which the boundary between the light and dark area of the image is determined by light detectors arranged in a line.For good resolution,to the measuring data obtained from the light detectors is applied a mathematical model corresponding with the information provided by the measuring data and the position of the boundary is determined by means of this model.