Extraction of Optical Rotation Angle in a Turbid Media Using Polarimetry System with Single Rotating Polarizer

A new single rotating polarizer system is proposed for extracting the optical rotation angle of optically active media using an arctangent method or lock-in algorithm. The simulation results show that the arctangent method provides a more robust approach for extracting the optical rotation angle than the lock-in algorithm. In experimental trials performed using phantom samples with glucose concentrations ranging from 0 to 500 mg/dL, the arctangent method shows an average error of 0.0015o, an average deviation of 0.0029o, and a correlation coefficient of R2 = 0.9994. Moreover, for glucose solutions containing 0.01% lipofundin, the average error of the extracted optical rotation angle is 0.0188o, while the average deviation and correlation coefficient are 0.029o and R2 = 0.8388, respectively. The response time of the proposed system is just 140 seconds. Overall, the results show that the proposed polarimetry system and arctangent method provide a feasible approach for performing glucose measurements