论文标题
跟踪从斑点移位测量的双重晶体的旋转
Tracking the rotation of a birefringent crystal from speckle shift measurement
论文作者
论文摘要
由于通过散射介质传播光束而观察到的随机强度分布被称为斑点图案。斑点与双发性晶体的相互作用，在此，YVO4导致E射线和O射线斑点。据观察，E射线和O射线斑点会随着晶体的旋转而经历角移位，并且移位取决于晶体的旋转角度。还发现，E射线和O射线斑点的移位速率不同，并且与散射介质上的光束入射的拓扑电荷无关。发现观察到的斑点模式的移位速率与E射线和O射线梁的移位速率相同。实验证明，可以从斑点移位测量中非常准确地跟踪双重晶体的旋转。
The random intensity distribution observed due to the propagation of a coherent beam of light through a scattering medium is known as a speckle pattern. The interaction of the speckles with a birefringent crystal, here, YVO4 results in the e-ray and o-ray speckles. It is observed that the e-ray and o-ray speckles experience an angular shift with the rotation of the crystal and the shift depends on the rotation angle of the crystal. It is also found that the rate of the shift is different for e-ray and o-ray speckles, and is independent of the topological charge of the beam incident on the scattering medium. The observed rate of shift of the speckle pattern is found to be same as that of the e-ray and o-ray beams. It is experimentally demonstrated that the rotation of a birefringent crystal can be tracked very accurately from the speckle shift measurement.
