Liquid crystal device-based novel intelligent polarimeter and test method

Abstract

The invention relates to a liquid crystal device-based novel intelligent polarimeter and a test method. The test method comprises that: a polarizer and an analyzer are regulated to be orthogonal and fixed before an optical active substance is added; after the optical active substance is added into a polarization tube, light emitted from a light source sequentially passes through the polarizer, a liquid crystal sheet, the polarization tube used for placing a substance to be detected, and the analyzer to reach a photoelectric cell, and the photoelectric cell outputs a signal; the signal is processed to obtain a rotation angle of the optical active substance; and the rotation angle is displayed. The liquid crystal sheet takes the place of a Faraday coil in the conventional polarimeter, and simultaneously, a motor, a corresponding servo motor and a mechanical transmission part are saved, so the cost and volume of the polarimeter are reduced; and in combination with digital signal processor (DSP) technology, the test method has the advantages of improving the signal processing capacity, setting different measurement modes by using a touch screen, and improving the intellectualization degree and measurement accuracy of the polarimeter.

Description

technical field [0001] The invention relates to a detection device, in particular to a novel intelligent polarimeter based on a liquid crystal device and a test method. Background technique [0002] When linearly polarized light passes through some optically active compounds or their solutions, the phenomenon that its polarization plane will be deflected around the optical axis is called optical rotation, and the angle of rotation is called optical rotation. Under certain conditions, the concentration of the optically active solution can be determined by detecting the rotation angle of the polarization plane after passing through the optically active solution. In recent years, the fields of medicine, food processing, organic chemical industry and biochemical analysis have all involved optical rotation analysis. [0003] The currently used digital polarimeter is mainly used to measure the optical rotation by the combination of light, electricity and machinery. The polarizer...

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at the problems of high cost, complex structure and low measurement accuracy of current digital polarimeters, and proposes a new type of intelligent polarimeter and testing method based on liquid crystal devices, using liquid crystal sheets to replace the Faraday coils in traditional polarimeters, At the same time, the motor, the corresponding servo circuit and the mechanical transmission part are omitted, which reduces the cost and volume of the instrument, and combined with DSP technology, it improves the signal processing capability, and can also set different measurement modes through the touch screen, which improves the measurement efficiency. The degree of intelligence and measurement accuracy of the instrument

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