Laser Polarimeter Laboratory for Measuring Scattering in Undergraduate Analytical Chemistry,Journal of Chemical Education

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Laser Polarimeter Laboratory for Measuring Scattering in Undergraduate Analytical Chemistry
Journal of Chemical Education ( IF 2.5 ) Pub Date : 2018-09-06 00:00:00 , DOI: 10.1021/acs.jchemed.8b00428
Ariana Joseph ₁ , Katherine Budden ₁ , Richard Cisek ₁ , Danielle Tokarz ₁

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In a university third-year instrumental chemistry laboratory students build a laser based polarimeter for determining light scattering with commercially available optical components used in modern optics research laboratories. During this laboratory experiment, students learn that solutions containing molecules which scatter light also influence the polarization properties of the laser beam by measuring Stokes parameters to calculate the degree of linearly polarized light. They also discover how the polarization properties of a laser beam are affected by half- and quarter-wave plates. Lastly, students are asked to recognize and assess the sources of error associated with the experiment including background intensity, integration time, and polarizer angle accuracy when measuring the Stokes parameters. A majority of students who completed the experiment agreed that this laboratory experiment required more critical thinking than traditional building instrumentation modules that they were exposed to, and that it improved their ability to learn independently and perform research.

中文翻译：

激光偏振计实验室，用于测量分析化学本科生的散射

在大学的三年级仪器化学实验室中，学生建造了一个基于激光的旋光仪，用现代光学研究实验室中使用的市售光学组件测定光的散射。在此实验室实验中，学生学习到，包含散射光的分子的溶液也可以通过测量斯托克斯参数来计算线性偏振光的程度，从而影响激光束的偏振特性。他们还发现半波和四分之一波片如何影响激光束的偏振特性。最后，要求学生在测量斯托克斯参数时识别并评估与实验相关的误差源，包括背景强度，积分时间和偏振片角度精度。

更新日期：2018-09-06

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