Malavalli A, Ackermann M, Aegerter C M
Opt Express. 2016 Oct 3;24(20):23018-23026. doi: 10.1364/OE.24.023018.
In turbid media, light gets multiply scattered to an extent that all the information of its propagation is scrambled over a characteristic distance called the transport mean free path. Controlling light propagation through such media is therefore challenging. By using a feedback signal, the input wavefront of light can be shaped such that light gets focused through or even inside a scattering medium [Vellekoop et al., Opt. Express36, 67(2008)]. In this article, we show that such an interferometric focus can be transformed into an array of multiple focal spots with a desired structure. These focal spots can serve as a structured illumination source to image the interior of thick scattering tissues as in deconvolution imaging or in the optical micromanipulation of microscopic targets.
在浑浊介质中，光会发生多次散射，以至于其传播的所有信息在一个称为输运平均自由程的特征距离上变得混乱。因此，控制光在这类介质中的传播具有挑战性。通过使用反馈信号，可以对光的输入波前进行整形，使得光能够聚焦穿过甚至聚焦在散射介质内部[韦勒库普等人，《光学快报》36, 67(2008)]。在本文中，我们表明这种干涉聚焦可以转化为具有所需结构的多个焦点阵列。这些焦点可以用作结构化照明源，用于对厚散射组织内部进行成像，就像在反卷积成像或微观目标的光学微操纵中那样。
