Drémeau Angélique, Liutkus Antoine, Martina David, Katz Ori, Schülke Christophe, Krzakala Florent, Gigan Sylvain, Daudet Laurent
Opt Express. 2015 May 4;23(9):11898-911. doi: 10.1364/OE.23.011898.
This paper investigates experimental means of measuring the transmission matrix (TM) of a highly scattering medium, with the simplest optical setup. Spatial light modulation is performed by a digital micromirror device (DMD), allowing high rates and high pixel counts but only binary amplitude modulation. On the sensor side, without a reference beam, the CCD camera provides only intensity measurements. Within this framework, this paper shows that the TM can still be retrieved, through signal processing techniques of phase retrieval. This is experimentally validated on three criteria : quality of prediction, distribution of singular values, and quality of focusing.
本文研究了采用最简单的光学装置来测量高散射介质传输矩阵（TM）的实验方法。空间光调制由数字微镜器件（DMD）执行，其允许高速率和高像素数，但仅进行二进制幅度调制。在传感器端，由于没有参考光束，电荷耦合器件（CCD）相机仅提供强度测量值。在此框架内，本文表明，通过相位恢复的信号处理技术仍可检索到传输矩阵。这在三个标准上得到了实验验证：预测质量、奇异值分布和聚焦质量。
