Abstract

Optical coherence tomography enables quick scans of translucent objects in a simple environment. Here, we apply this technique to wood-based biofoam. We measure the geometrical properties of the foam, such as bubble eccentricity and density fluctuations, in addition to characterising the possible orientation of fibres. We find that the wood-based foams are extremely suitable for optical coherence tomography due to their translucent nature and large changes of optical density between air-filled bubbles and solid films. Measurement of bubble eccentricity revealed a reasonably high aspect ratio of 1:2, enabling the orientation of long cellulose fibres if added to the mixture. The results demonstrate an effective method to characterise foamlike metamaterials. Furthermore, focusing on eccentricity enables the adjustment of the foam’s manufacturing method and, in turn, helps to produce anisotropic structures.

Graphical abstract

中文翻译：

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使用光学相干断层扫描测量生物泡沫各向异性

摘要

光学相干断层扫描可以在简单的环境中快速扫描半透明物体。在这里，我们将这种技术应用于木质生物泡沫。除了表征纤维的可能方向外，我们还测量泡沫的几何特性，例如气泡偏心率和密度波动。我们发现木质泡沫非常适合光学相干断层扫描，因为它们具有半透明的性质以及充气气泡和固体薄膜之间的光密度变化很大。气泡偏心率的测量显示了相当高的 1:2 纵横比，如果将长纤维素纤维添加到混合物中，则可以使长纤维素纤维定向。结果证明了一种表征泡沫状超材料的有效方法。此外，

图形概要