Liquid Refractive Index Measurement Based on Digital Image Processing

Abstract

In order to measure the refractive index of transparent liquid quickly and accurately, a liquid refractive index measurement method based on digital image processing is proposed. Based on the principle of dynamic measurement based on experiment, this method theoretically derives the expression of liquid refractive index based on digital processing. For different kinds of transparent liquids, only one front image of the device is needed to obtain the refractive index of the liquid to be measured. The method is applied to the refractive index measurement of three common transparent liquids: water, peanut oil and 53˚ liquor at 20˚C. The results show that the average