22 May 2014 Particle swarm optimization for focusing by phase modulation through scattering media
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Particle Swarm Optimization (PSO) is exploited in an optical focusing system, by changing the phase of the incident light, which can break the diffraction limit and enhance focal intensity through highly scattering media. To emphasize that the focusing optical system is mainly composed of a spatial light modulator (SLM), a lens and highly scattering media placed behind the lens. The stepwise sequential algorithm and the continuous sequential algorithm are sensitive to noise and the genetic algorithm converges slowly. Compared with these algorithms theoretically and experimentally, the PSO is robust, effective and able to converge rapidly, which obtains a best solution by following the search for the optimal particle in the solution space. The capacity of beyond-diffraction and increasing intensity of the focus through dynamic scattering media could be conducive to biological microscopy and imaging through turbid environments.
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Ligen Peng, Ligen Peng, Weijia Dai, Weijia Dai, Xiaopeng Shao, Xiaopeng Shao, "Particle swarm optimization for focusing by phase modulation through scattering media", Proc. SPIE 9124, Satellite Data Compression, Communications, and Processing X, 91241D (22 May 2014); doi: 10.1117/12.2052989; https://doi.org/10.1117/12.2052989

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