Hussain Ghazanfar, Ikram Masroor
Department of Physics and Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences, Islamabad 45650, Pakistan.
Appl Opt. 2010 Feb 20;49(6):1025-31. doi: 10.1364/AO.49.001025.
A detailed analysis of a carousel interferometer is presented for the measurement of an unknown angle and axis of rotation. The technique exploits a set of compensator glass plates and a right-angle prism that is placed in each of the two arms of the interferometer. The two sets are placed at the same rotational stage, while the end mirrors of the interferometer are static. When rotation takes place, individual and relative optical path differences are generated in the two beams of the interferometer. The generated phase differences contribute toward finding the angle and axis of rotation. The analysis is presented for any initial position of the interferometer, i.e., the radial vector from the axis of rotation to the apex of one of the prisms used. The results show the slight variations in the error and nonlinearity when different parameters are manipulated. Moreover, the trade-off between the maximum size of the prisms and the radial distances are also presented.
本文对用于测量未知旋转角度和旋转轴的转盘干涉仪进行了详细分析。该技术利用了一组补偿玻璃板和一个直角棱镜，它们分别放置在干涉仪的两个臂中。两组装置放置在同一个旋转平台上，而干涉仪的端镜是固定的。当发生旋转时，干涉仪的两束光中会产生单独的和相对的光程差。产生的相位差有助于确定旋转角度和旋转轴。本文针对干涉仪的任何初始位置进行了分析，即从旋转轴到所使用的其中一个棱镜顶点的径向矢量。结果表明，当操纵不同参数时，误差和非线性会有轻微变化。此外，还给出了棱镜最大尺寸与径向距离之间的权衡关系。
