Intensity-corrected 4D light-in-flight imaging.
Intensity-corrected 4D light-in-flight imaging.
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DOI：
10.1364/oe.425930
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发表时间：
2021-03
期刊：
影响因子：
3.8
通讯作者：
I. Morland;Fengzheng Zhu;G. Martin;I. Gyongy;J. Leach
中科院分区：
文献类型：
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作者：
I. Morland;Fengzheng Zhu;G. Martin;I. Gyongy;J. Leach
飞行光成像(LIF)是在光运动和与物体相互作用时测量和重建光的路径。众所周知，相对论效应会导致视速度与光速有很大的不同。然而，不太为人所知的是，瑞利散射和成像光学的影响可以导致观测到的强度沿光路变化几个数量级。我们开发了一个模型，使我们能够校正所有这些影响，因此我们可以准确地反演观测数据，并重建激光脉冲在空气中传输时的真正强度校正光路。我们通过观察单光子雪崩探测器(SPAD)阵列数据获得的激光脉冲传输到相机和离开相机的光子到达时间和强度分布，证明了该模型的有效性。然后我们可以在四个维度(三个空间维度和时间)重建光的真实强度校正路径。
Light-in-flight (LIF) imaging is the measurement and reconstruction of light's path as it moves and interacts with objects. It is well known that relativistic effects can result in apparent velocities that differ significantly from the speed of light. However, less well known is that Rayleigh scattering and the effects of imaging optics can lead to observed intensities changing by several orders of magnitude along light's path. We develop a model that enables us to correct for all of these effects, thus we can accurately invert the observed data and reconstruct the true intensity-corrected optical path of a laser pulse as it travels in air. We demonstrate the validity of our model by observing the photon arrival time and intensity distribution obtained from single-photon avalanche detector (SPAD) array data for a laser pulse propagating towards and away from the camera. We can then reconstruct the true intensity-corrected path of the light in four dimensions (three spatial dimensions and time).