Perspective on the development and application of light-field cameras in flow diagnostics
Perspective on the development and application of light-field cameras in flow diagnostics
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DOI：
10.1088/1361-6501/ac026e
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发表时间：
2021
影响因子：
2.4
通讯作者：
Z. Tan;B. Thurow
中科院分区：
文献类型：
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作者：
Z. Tan;B. Thurow
近年来，多摄像机流动诊断在三维和多物理场测量领域取得了很大的进展。然而，成本、复杂性和光学接入带来了挑战，使许多实验室无法实现多相机技术。在这种情况下，光场（LF）成像代表了一种替代方法，可以潜在地缓解这些挑战中的一些。LF流诊断是在过去十年中引入的测量技术的分支，其基于全光相机经由单个物镜透镜和图像传感器捕获三维和多光谱数据的独特能力-尽管由于有限的视差角而具有降低的横向分辨率和3-10的深度与横向不确定性比。到目前为止，LF流诊断已经成功地实现了显着的相机减少，以及其他性能的改进，在3D流场测速，3D粒子跟踪，3D标量场层析成像，微流体测速和多光谱成像，以及早期演示的单相机多物理测量的应用，如3D流体-结构相互作用。在这里，我们讨论了LF流量诊断的发展状况，强调了正在面临的挑战，并预测了在不久的将来可能取得的进展。
Multi-camera flow diagnostics have made large gains in recent years in the field of three-dimensional and multi-physics measurements. However, cost, complexity and optical access pose challenges that place multi-camera techniques out of reach for many labs. In that context, light-field (LF) imaging represents an alternative approach that can potentially alleviate some of these challenges. LF flow diagnostics is a branch of measurement techniques introduced within the last decade that are based on a plenoptic camera’s unique ability to capture three-dimensional and multi-spectral data via a single objective lens and image sensor-albeit at reduced lateral resolutions and depth-to-lateral uncertainty ratios of 3–10 due to limited parallax angle. Thus far, LF flow diagnostics have successfully achieved significant camera-reduction alongside other performance improvements in 3D flow velocimetry, 3D particle tracking, 3D scalar-field tomography, micro-fluidic velocimetry and multi-spectral imaging, as well as early demonstrations of single-camera multi-physics measurements for applications such as 3D fluid-structure interactions. Here, we discuss the state of development in LF flow diagnostics, highlight on-going challenges, and project potential advancements in the near future.