基于偏振差分法和磁光调制法的抗干扰旋光测量仪#br#

doi:10．14139/j．cnki．cn22-1228．2026．05．012

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摘要将偏振差分与磁光调制相结合，搭建了一种抗干扰差分旋光仪。通过双路信号差分抑制光源波动，结合磁光调制提取交流分量以消除环境光干扰，并利用 Python 实时处理数据，实现旋光角与溶液浓度的一键解算。实验表明，该装置在外界强光干扰下对 0．020～0．400 g/mL 葡萄糖溶液的测量误差显著低于传统方法，适用于大学物理实验教学与原理演示。

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	王俊然
	史欣然
	朱心阳

关键词: 旋光性旋光测量差分法磁光调制

Abstract: By combining polarisation difference measurement with magneto-optical modulation，an anti-
interference differential polarimeter has been developed．This device suppresses fluctuations in the light source
through dual-channel signal differentiation，extracts the alternating current component via magneto-optical
modulation to eliminate ambient light interference，and utilises Python for real-time data processing，enabling
one-click calculation of the specific rotation and solution concentration．Experiments demonstrate that，under
conditions of strong external light interference，the measurement error of this apparatus for glucose solutions
ranging from 0．020～0．400 g/mL is significantly lower than that of conventional methods，making it suitable for
university physics laboratory teaching and the demonstration of physical principles．

Key words: optical rotation polarimetry differential method magneto-optical modulation

发布日期: 2026-10-21

O 436．3

基金资助: 江苏省本科高校“理工类公共基础课程教学改革研究”专项课题(2024LGJK027)

引用本文:

王俊然 , 史欣然 , 朱心阳 . 基于偏振差分法和磁光调制法的抗干扰旋光测量仪#br#[J]. 大学物理实验, 2026, 39(5): 72-77.
WANG Junran , SHI Xinran , ZHU Xinyang . An Anti-Interference Polarimetricanalyser Based on the Polarisation Difference Method and Magneto-Optical Modulation#br# #br#. Physical Experiment of College, 2026, 39(5): 72-77.

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https://dawushiyan.jluct.edu.cn/CN/10．14139/j．cnki．cn22-1228．2026．05．012 或 https://dawushiyan.jluct.edu.cn/CN/Y2026/V39/I5/72

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