Imaging through biological tissues requires fast retrieval of beam scanning. Regarding this purpose, the angular memory effect (AME) is a classical optical effect studied and widely applied. However, the imaging range of AME is confined, which relies on the thickness or scattering mean free path of scattering media. To break the finite imaging boundary, we numerically exploit the phase relation in transmission matrix (TM) of weak scattering media, from which a higher-order phase relation named optical phase association (OPA) extends beyond AME. Furthermore, we found that the OPA could enable uniform light focusing across output channels through weak scattering media in simulation. We believe the optical phase association would improve the imaging approaches such as confocal imaging and speckle autocorrelation.
KEYWORDS: Scatter measurement, Super resolution, Signal to noise ratio, Image segmentation, Wavefronts, Scattering, Light scattering, Particles, Digital micromirror devices, Modulation
The coherence of light will be destroyed when propagate through scattering medium, which scrambles the transmitted light and thus forms speckle pattern behind. In order to understand the scattering process and implement applications such as imaging through scattering medium, theory for transmission matrix, eigenvectors have been studied and exploited. However, the Huygens–Fresnel principle implies that regional local effect of scattering process is existing, which could be involved in spatially engineered effective scattering particles, we name it scattering tunnels. We demonstrate the scattering tunneling effect in our experiment and implement this effect to achieve super resolution modes manipulation on input plane of scattering system. The scattering tunnels might introduce another perspective to study the scattering process, and provide researchers a way to improve efficiency of light control through scattering medium.
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