Spinning object detection based on perfect optical vortex
Spinning object detection based on perfect optical vortex
复制标题
基于完美光学涡旋的旋转物体检测
DOI：
10.1016/j.optlaseng.2019.105842
复制
发表时间：
2020-01-01
影响因子：
4.6
通讯作者：
Shao, Qiongling
中科院分区：
文献类型：
--
作者：
Qiu, Song;Ren, Yuan;Shao, Qiongling
与角动量相关的旋转多普勒效应为转速检测开辟了一条新的途径。以前的许多工作研究了基于拉盖尔-高斯或贝塞尔-高斯光束的旋转多普勒效应。在这项工作中，我们提出了一个方案，在旋转物体检测采用完美的漩涡。用贝塞尔-高斯光束通过凸透镜得到理想涡旋。提出了一种叠加光系统的实验方案。结果表明，理想涡旋光束具有与其他涡旋光束相同的良好的转速检测性能。此外，理想涡旋的环半径可以方便地改变，而不需要改变拓扑荷，这对于不同尺寸的目标的检测更加灵活。特别是当叠加光束的两个分量的拓扑荷不处于相同的量级时，完美涡旋光束的性能优于拉盖尔-高斯光束。随着传播距离的增加，理想涡旋仍然具有令人满意的转速检测精度。我们的研究结果是有用的，当人们想要操纵和获得的旋转速度的微小颗粒的同时。此外，这项工作是对多普勒测速技术的重要补充，可能在显微操作和遥感方面有应用价值。
The rotational Doppler effect associated with angular momentum paves a new way to the rotation speed detection. Many previous works have researched the rotational Doppler effect based on the Laguerre-Gaussian or Bessel-Gaussian beam. In this work, we propose a scheme in the spinning object detection by employing the perfect vortex. The perfect vortex is obtained by passing Bessel-Gaussian beam through a convex lens. An experiment scheme is proposed in a superposition light system. The results show that the perfect vortex has the same well performance in rotation speed detection with other optical vortex beams. Furthermore, the ring radius of the perfect vortex is convenient to change without bothering the topological charge, which is more flexible in detecting targets with different size. Especially, when the topological charges of the two components of a superposition beams are not at the same magnitude, the perfect vortex is performing better than the Laguerre-Gaussian beam. As the propagation distance increase, the perfect vortex still has a gratifying accuracy of rotation speed detection. Our findings are useful when people want to manipulate and obtain the rotation speed of the micro particles simultaneously. Moreover, this work is an important supplement in the Doppler velocimetry and maybe useful in micromanipulation and remote sensing.