Characterization of Photoelastic Modulator for Highly Sensitive Instrument for Measuring Optical Birefringence

用于测量光学双折射的高灵敏度仪器的光弹性调制器的表征

• 批准号: 03650719
• 负责人: MAEDA Shiro
• 金额: $ 1.22万
• 依托单位: Fukui University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650719/
• 关键词: Photoelastic Modulator; Polarization modulation Spectroscopy; Birefringence; 複屈析

1. High performance photoelastic modulator (PEM) was made whose thickness is one half of an conventional one. A dynamic residual birefringence in optical element of PEM makes artifact signals combining with non-ideality of other optical elements, detector, and lock-in amplifier. Therefore, PEM whose optical element has small dynamic birefringence must be used. We succeeded in measuring correct circular dichroism spectra of standard samples from ultra violet to visible light range by using our new type PEM.2. Automatic measuring system for measurements of admittance parameters of PEM was made. IBM PC/XT, LCR meter, and frequency synthesizer are combined with GP-IB. Data analyses are made on IBM PC/AT compatible personal computer by using RS/I, which is high performance software for scientific data analysis.

1. 制备了厚度为传统光弹性调制器一半的高性能光弹性调制器（PEM）。PEM光学元件的动态残余双折射与其他光学元件、检测器和锁相放大器的非理想性相结合，产生伪信号。因此，必须选用光学元件动态双折射小的PEM。我们成功地用我们的新型pme - 2测量了标准样品从紫外到可见光范围内的圆二色光谱。研制了PEM导纳参数自动测量系统。IBM PC/XT， LCR仪表，频率合成器与GP-IB相结合。在IBM PC/AT兼容的个人计算机上，使用RS/I高性能科学数据分析软件进行数据分析。