Focusing through dynamic scattering media
Focusing through dynamic scattering media
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DOI：
10.1364/oe.20.015086
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发表时间：
2012-07-02
期刊：
影响因子：
3.8
通讯作者：
Bifano, T.
中科院分区：
文献类型：
--
作者：
Stockbridge, C.;Lu, Y.;Bifano, T.
我们演示了相干光通过动态散射介质的稳态聚焦。使用1020段反射式MEMS空间光调制器，采用坐标下降优化技术，在空间和时间上控制入射光束的相位。对于散斑去相关时间常数从0.4秒到20秒的动态介质，我们获得了5到400的焦强度增强。我们表明，这种优化方法与快速的空间光调制器相结合，能够通过动态介质进行聚焦。即使通过动态散射介质传输也能够增强焦点强度的能力，可以在混浊环境中促进生物显微镜和成像的发展。(C)2012年美国光学学会
We demonstrate steady-state focusing of coherent light through dynamic scattering media. The phase of an incident beam is controlled both spatially and temporally using a reflective, 1020-segment MEMS spatial light modulator, using a coordinate descent optimization technique. We achieve focal intensity enhancement of between 5 and 400 for dynamic media with speckle decorrelation time constants ranging from 0.4 seconds to 20 seconds. We show that this optimization approach combined with a fast spatial light modulator enables focusing through dynamic media. The capacity to enhance focal intensity despite transmission through dynamic scattering media could enable advancement in biological microscopy and imaging through turbid environments. (c) 2012 Optical Society of America