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arXiv 1502.00270physics.optics
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生物组织中散射光角记忆效应的表征

Characterization of the angular memory effect of scattered light in biological tissues

Sam Schott, Jacopo Bertolotti, Jean-Francois Léger, Laurent Bourdieu, Sylvain Gigan

摘要:

高分辨率光学显微镜在神经科学中是必不可少的,但在生物组织中受到散射的影响。因此,它只允许进入表面层。最近开发的技术通过利用透射光中的角度相关性来使用散射光子进行成像,并且可能增加成像深度。但这些相关性(“角度记忆效应”)的范围非常短,理论上只存在于散射介质的后面,而不存在于散射介质的内部。通过对神经组织的测量和补充模拟,我们发现生物组织中的强前向散射可以将记忆效应范围(以及因此可能的视场)提高一个数量级以上,与$\sim$ 1mm厚组织层的各向同性散射相比。

英文摘要:

High resolution optical microscopy is essential in neuroscience but suffers from scattering in biological tissues. It therefore grants access to superficial layers only. Recently developed techniques use scattered photons for imaging by exploiting angular correlations in transmitted light and could potentially increase imaging depths. But those correlations (`angular memory effect') are of very short range and, in theory, only present behind and not inside scattering media. From measurements on neural tissues and complementary simulations, we find that strong forward scattering in biological tissues can enhance the memory effect range (and thus the possible field-of-view) by more than an order of magnitude compared to isotropic scattering for $\sim$1\,mm thick tissue layers.

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