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相关实验视频

Updated: Jun 8, 2025

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

结时间:动态激光追踪器测量与像素探测器使用临时别名的测量.

Joshua A Gordon¹, Steven S Borenstein²

¹NIST.

Journal of the CMSC

|November 1, 2024

概括

这项研究引入了一种非接触式激光追踪器方法,使用时空异位来测量移动的物体,就好像它们是静止的. 这种技术可以实现精确的动态状态测量,而不需要激光追踪器跟踪物体.

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科学领域:

计量学计量学计量学
光学测量测量光学测量
物理物理学物理

背景情况:

激光追踪器对于精确的空间测量至关重要.
使用激光追踪器测量动态物体通常需要它们跟随物体的运动.
现有的方法在准确捕捉移动物体的动态状态方面面临挑战.

研究的目的:

介绍一种新的非接触式技术,用于使用激光追踪器测量移动的物体.
为了实现对象的动态状态测量而不需要激光追踪器来跟踪它们的运动.
通过对刚性和非刚性物体进行受控实验来验证该技术的准确性.

主要方法:

利用时空别名来将一个物体的动态运动分解成相对于激光追踪器的静止参考框架.
使用一个带有三个摄像头的像素探测器,其率调整为别名运动.
触发特定频率的摄像头,使移动的物体看起来对测量系统来说是静止的.

主要成果:

通过使动态物体看起来静止,证明了对动态物体的精确空间计量.
通过在静态和动态条件下对刚性目标的测量进行比较,验证了该技术.
成功测量了一个旋转的非刚性物体的3D运动,以不到1%的误差确定其旋转频率.

结论:

开发的技术允许对象进行非接触式,动态的测量,无需主动跟踪.
这种方法将物体运动与激光追踪器运动分离开来,促进激光追踪器的精确动态表征和校准.
该技术显示了在动态环境中推进计量学的潜力,并验证了像牛顿力学这样的物理模型.

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