| 摘要 |
A method of determining a three-dimensional velocity field in a volume, the particles within the volume being excited to radiate by illuminating said volume, a) at least two cameras simultaneously image capturing the observation volume at two different instants of time (t1, t2) at least, b) the observation volume being divided into small volume elements (voxels), c) each voxel being projected at the location x, y, z onto the image points (xn, yn) of the at least two cameras using a projection equation, d) the intensity of all the voxels being reconstructed from the measured intensity of the respective ones of the associated image points (xn, yn), e) a plurality of voxels being combined to form an interrogation volume, f) the displacement vector (dx, dy, dz) being determined at the times (t1, t2) at the same location by a three-dimensional cross correlation of the two interrogation volumes.
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