DETERMINATION OF THE SPECIFIC ROTATION OF AN OPTICALLY ACTIVE SUBSTANCES BY USING POLARIMETER

A half-shade polarimeter is an optical instrument used to measure the optical rotation of substances, typically liquid solutions containing optically active compounds. These compounds have the ability to rotate the plane of polarization of linearly polarized light, a property that can be exploited to determine the concentration, purity, or specific rotation of the substance.

Light waves are a form of electromagnetic radiation, consisting of oscillating electric and magnetic fields. In natural light, these oscillations occur in all possible planes perpendicular to the direction of propagation. Polarization is the process of filtering out light waves so that they only oscillate in a single plane, producing linearly polarized light. There are several methods for achieving polarization, including reflection, refraction, and absorption. In the case of Laurent’s Half-Shade Polarimeter, polarization is achieved using a polarizer, typically a Nicol prism or a polarizing film, which transmits light waves oscillating in a single plane while absorbing or reflecting the others.

Because light-field and polarization information contain much information of scenes, light-field and polarization imaging-systems can be used, e.g., for target detection, material classification, and biological analysis. However, most conventional systems rely on scanning or camera arrays, which tend to make the system both bulky and unstable. Here, we investigate a novel approach, snapshot polarimetryc , volumetric imaging (SPVI), which introduces micro-polarization elements into the paradigmatic focused light-field imaging system. SPVI can simultaneously capture and reconstruct the light-field and polarization information of a scene using a single detector. The validity and accuracy of SPVI are determined via Stoke-parameter measurements and depth measurements. Compared to conventional polarimetric light-field imagers, SPVI excels with respect to compactness, robustness, and low cost. Moreover, this tool might enable new possibilities for polarimetric 3D analysis.

Key words :Analyzer, Dextrorotatory, Optically active, Polarimeter, Polarizer, Specific rotation, Plan polarized light