Figure 3
From: A high-resolution polarimeter formed from inexpensive optical parts
(a) Normalised experimental input signals for a typical “blank” measurement, using ultra-pure water and a 5-cm optical cell. The reference and object signals are denoted by a blue solid line and an orange dashed line, respectively. The signals were obtained using a 0.6-ms sample time and a motor speed of approximately eight revolutions per second. (b,c) Least-squares optimised mono-sinusoidal fits to the reference and object signals. (d,e) Errors in the sinusoidal fits, expressed as a percentage of the mean signal value. (f–j) Equivalent plots for an “active” measurement, with a 202 mg/ml sucrose solution in the optical cell.
