Opt Lett. 2018 Aug 15;43(16):3842-3845. doi: 10.1364/OL.43.003842.
This Letter reports a hybrid three-dimensional (3D) visualization approach for turbulent flows at the kilohertz range. The approach, named scanning volumetric laser induced fluorescence (SVLIF), combines 3D tomography with scanning to significantly enhance spatial resolution of 3D measurements in a given domain (or equivalently, to enlarge the domain size under a given resolution) compared to past tomographic approaches. The SVLIF technique (1) divides a large measurement domain into smaller sub-domains, (2) performs 3D tomographic measurement in each sub-domain by scanning the excitation laser pulses across them consecutively, and (3) combines the measurements in all sub-domains to form a final measurement. This hybrid approach enables the conversion of temporal resolution into spatial resolution or domain size to optimize 3D measurements in a wider design space. In this work, the SVLIF was demonstrated and validated at a scanning rate of 1.86 kHz in a volume of 38.4 mm×26.5 mm×25.2 mm with 7.1 million voxels, representing a ∼5 times enhancement in the number of voxels or the domain size compared to past tomographic techniques.
这封信件报告了一种用于千赫兹范围内湍流的混合三维（3D）可视化方法。该方法名为扫描体层激光诱导荧光（SVLIF），它将 3D 层析成像与扫描相结合，与过去的层析成像方法相比，可在给定域中显著提高 3D 测量的空间分辨率（或者等效地，在给定分辨率下增大域尺寸）。SVLIF 技术（1）将大的测量域划分为较小的子域，（2）通过连续扫描激励激光脉冲穿过子域，在每个子域中进行 3D 层析测量，（3）将所有子域中的测量结果组合起来形成最终的测量结果。这种混合方法能够将时间分辨率转换为空间分辨率或域尺寸，从而在更广泛的设计空间中优化 3D 测量。在这项工作中，SVLIF 在 1.86 kHz 的扫描速率下在 38.4 mm×26.5 mm×25.2 mm 的体积中得到了演示和验证，其中有 710 万个体素，与过去的层析成像技术相比，体素数量或域尺寸增加了约 5 倍。
