Research of optical rotation measurement system based on centroid algorithm

Anoptical rotationmeasurementsystem based on digital signal processor, modulated laser, and step motor rotating stage is established. Centroid algorithm featured fast and simple calculation is introduced to process light signals with or without sample to obtain the optical rotating angle through the step difference between two centroids. Thesystem performance is proved experimentally with standardquartz tubes and glucose solutions. After variousmeasurements, the relative error and precision of thesystem are determined to 0.4% and 0.004 °, which demonstrates the reliable repeatability and high accuracy of wholemeasurementsystem.

Source: Review of Scientific Instruments - September 19, 2016 Category: Physics Authors: Junjie Cao, Hongzhi Jia, Xinrong Shen and Shixin Jiang Source Type: research