Structurally, the fully automatic polarimeter consists of four core modules: the first is the light source system, which often uses sodium lamps (589.3nm D-line) or LED monochromatic light sources to ensure stable polarized light wavelengths; The second is the polarization system, which includes a polarizer and an analyzer. The polarizer converts natural light into linearly polarized light, while the analyzer is used to detect the rotation angle of the polarization plane; The third is the sample cell, which adopts a constant temperature design (usually 20 ℃ or 25 ℃) to eliminate the influence of temperature on the optical rotation; The fourth is the detection and control system, which consists of a photodetector, servo motor, and microcontroller. It can automatically adjust the angle of the analyzer to achieve accurate measurement and data output of rotation.

Its core technological breakthroughs are reflected in three aspects: first, automatic zero finding and compensation technology, abandoning the traditional manual adjustment of the analyzer and achieving fast zero finding through photoelectric signal feedback, with measurement accuracy improved to ± 0.001 °; The second is multi wavelength compatibility technology, which breaks through the limitation of a single sodium light wavelength and supports multi wavelength measurement in the UV visible band to meet the detection needs of different substances; The third is an intelligent temperature control and calibration system, which integrates high-precision temperature sensors and automatic calibration algorithms to effectively offset temperature drift and instrument errors, achieving all-weather stable operation. These technological breakthroughs have made fully automatic polarimeters widely used in fields such as pharmaceuticals, food, and chemical engineering, becoming a key tool for analyzing chiral substances.