Editorial: Introduction to the special issue on high-resolution optical focusing and imaging within or through thick scattering media

Lai, Puxiang; Park, YongKeun

doi:10.1142/s1793545819020024

Cited by 1 publication

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Optical scattering in disordered media is a significant challenge to utilizing optical techniques in a wide variety of applications, such as biological imaging [1][2][3][4], subsurface chemistry in heterogeneous materials [5,6], and atmospheric optical systems [7,8]. Over the past two decades much work has been performed to develop techniques that negate the influence of scattering with the majority of work focusing on utilizing wavefront shaping to counteract scattering [9].…”

Section: Introductionmentioning

confidence: 99%

Genetic algorithms for focusing inside opaque media

Anderson

Eilers

2020

J. Opt.

View full text Add to dashboard Cite

We characterize the performance of standard and micro genetic algorithms when applied to focusing inside of an opaque media using feedback from a fluorescent guidestar particle. Using this feedback modality we find that the algorithms optimize more quickly (but to a lower enhancement) than when using reflective feedback, with the underlying mechanism being the fluorescence signal’s multimodal nature and lower signal-to-noise ratio. We also find that both algorithms’ performance decrease at very large numbers of bins due to decoherence effects related to a bin-dependent iteration time. To mitigate this effect we implement multithreaded functionality in the genetic algorithms and find that for our specific computer we obtain a 3.3 × improvement in speed utilizing multithreading. These results demonstrate the usefulness of both algorithms for focusing inside of opaque media, which has applications in biological imaging and the study of subsurface chemical reactions in heterogeneous materials.

show abstract