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使用数字微镜器件进行高速、复杂波前整形。

High speed, complex wavefront shaping using the digital micro-mirror device.

作者信息

Ayoub Ahmed B, Psaltis Demetri

机构信息

Optics Laboratory, Ecole Polytechnique Federale de Lausanne (EPFL), 1015, Lausanne, Vaud, Switzerland.

出版信息

Sci Rep. 2021 Sep 22;11(1):18837. doi: 10.1038/s41598-021-98430-w.

DOI:10.1038/s41598-021-98430-w
PMID:34552161
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8458445/
Abstract

Digital micro-mirror devices (DMDs) have been deployed in many optical applications. As compared to spatial light modulators (SLMs), they are characterized by their much faster refresh rates (full-frame refresh rates up to 32 kHz for binary patterns) compared to 120 Hz for most liquid crystal SLMs. DMDs however can only display binary, unipolar patterns and utilize temporal modulation to represent with excellent accuracy multiple gray-levels in display applications. We used the built-in time domain dynamic range representation of the DMD to project 8-bit complex-fields. With this method, we demonstrated 8-bit complex field modulation with a frame time of 38.4 ms (around 0.15 s for the entire complex-field). We performed phase conjugation by compensating the distortions incurred due to propagation through free-space and a scattering medium. For faster modulation speed, an electro-optic modulator was used in synchronization with the DMD in an amplitude modulation mode to create grayscale patterns with frame rate ~ 833 Hz with display time of only 1.2 ms instead of 38.4 ms for time multiplexing gaining a speed up by a factor of 32.

摘要

数字微镜器件（DMD）已被应用于许多光学领域。与空间光调制器（SLM）相比，其特点是刷新率更快（二进制图案的全帧刷新率高达32kHz），而大多数液晶SLM的刷新率为120Hz。然而，DMD只能显示二进制单极性图案，并利用时间调制在显示应用中以极高的精度表示多个灰度级。我们利用DMD的内置时域动态范围表示来投射8位复场。通过这种方法，我们展示了帧时间为38.4ms（整个复场约0.15s）的8位复场调制。我们通过补偿在自由空间和散射介质中传播所产生的畸变来实现相位共轭。为了实现更快的调制速度，我们使用了一个电光调制器，使其与DMD同步工作在幅度调制模式下，以创建帧率约为833Hz的灰度图案，显示时间仅为1.2ms，而不是时分复用所需的38.4ms，速度提高了3倍。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/a01a7644954f/41598_2021_98430_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/44bdac6b22f4/41598_2021_98430_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/b68dad0204c3/41598_2021_98430_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/1c1d5b13214a/41598_2021_98430_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/d04c856d2764/41598_2021_98430_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/e03990cd0984/41598_2021_98430_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/dea6127e4707/41598_2021_98430_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/7f42c7a76692/41598_2021_98430_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/0c6fe6471421/41598_2021_98430_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/7e323c39a503/41598_2021_98430_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/9302cce64c22/41598_2021_98430_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/53ee7a2da6f3/41598_2021_98430_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/a01a7644954f/41598_2021_98430_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/44bdac6b22f4/41598_2021_98430_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/b68dad0204c3/41598_2021_98430_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/1c1d5b13214a/41598_2021_98430_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/d04c856d2764/41598_2021_98430_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/e03990cd0984/41598_2021_98430_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/dea6127e4707/41598_2021_98430_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/7f42c7a76692/41598_2021_98430_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/0c6fe6471421/41598_2021_98430_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/7e323c39a503/41598_2021_98430_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/9302cce64c22/41598_2021_98430_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/53ee7a2da6f3/41598_2021_98430_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8aaf/8458445/a01a7644954f/41598_2021_98430_Fig12_HTML.jpg

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