The full details of a newly developed versatile, portable and low-cost magneto-optical device for the accurate determination of Verdet constant over the wavelength range of 400–480 nm in undergraduate physics and chemistry labs are presented. The elevated sensitivity of the device is achieved by using a semiconducting photodiode detector coupled with an electronic circuit board, which is configured to autonomously record the finest rotation angle in the polarization direction of the transmitted light relative to a reference polarizer. Two different mechanisms to generate a strong coaxial magnetic field of ∼1.34 T are presented, using either a ring neodymium permanent magnet or a solenoid fed by a lithium-ion battery cell. Due to its versatility, portability and low-cost, the presented device is expected to replace most currently existing bulky and expensive setups.

中文翻译：

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使用新型多功能，便携式和低成本磁光旋转器对Verdet常数进行介电常数测定

介绍了一种新开发的多功能，便携式且低成本的磁光设备的详细信息，该设备可用于在大学物理和化学实验室中准确测定400-480 nm波长范围内的Verdet常数。通过使用与电子电路板耦合的半导体光电二极管检测器来提高设备的灵敏度，该半导体光电检测器配置为自主记录相对于参考偏振器的透射光偏振方向上的最佳旋转角。提出了两种不同的产生约1.34 T强同轴磁场的机制，它们是使用环形钕永磁体或由锂离子电池供电的螺线管。由于其多功能性，便携性和低成本，