Liquid crystals were chosen because their strong birefringence provides a simple way to observe their rotation around the laser beam axis.
选择液晶是因为它们强烈的双折射提供了一种简单的方法去观察它们绕着激光光轴的旋转。
2
The beam motion is divided into two parts: rigid rotation and flexible vibration.
假设梁的运动由刚性回转与柔性振动两部分组成。
3
Using a optical transmission system to make the laser beam to scan on the superconducting target with different radii rotation and to ablate it for depositing large area superconducting films.