光相位延迟器延迟量的智能化测量

Intelligentized Measurement of Optical Phase Retardation

从琼斯矩阵理论出发,利用偏振镜、分束器和锁相放大器以及微处理器,搭建了测试系统,实现了数据的自动化处理。利用闭环反馈控制系统和高精度步进马达,对旋转角度进行了反馈控制,利用Si光电探测器,使用范围覆盖近紫外到近红外,创建的测量系统具有测量精度高,重复性好,自动化程度高,操作简单的特点。经过对菲涅耳菱体型相位延迟器件的测试,测量误差小于0.3%。该系统也可以用来测量其他类型器件的相位延迟,在偏光测试领域有着广泛的应用。

Based on the Jones matrix, using polariser, beam splitter and lock-in amplifier and microprocessor, a testing and automatic processing system for the data was constructed. A high accurate step motor was used to control the rotation angle by the feedback loop system. The Si electric optical detector was used to detect the signal from near ultraviolet to near infrared. The retardation of the Fresnel rhomb phase retarder was measured with the measurement error less than 0.3%. This system can measure various types of retardation, it can be used in the field of the polarization measurement.