We show how biological elements, like live bacteria species and Red Blood Cells (RBCs) can accomplish optical functionalities in DH systems. Turbid media allow coherent microscopy despite the strong light scattering these provoke, acting on light just as moving diffusers. Furthermore, a turbid medium can have positive effects on a coherent imaging system, providing resolution enhancement and mimicking the action of noise decorrelation devices, thus yielding an image quality significantly higher than the quality achievable through a transparent medium in similar recording conditions. Besides, suspended RBCs are demonstrated to behave as controllable liquid micro-lenses, opening new possibilities in biophotonics for endoscopy imaging purposes, as well as telemedicine for point-of-care diagnostics in developing countries and low-resource settings.
P. Ferraro, V. Bianco, M. Paturzo, L. Miccio, P. Memmolo, F. Merola, and V. Marchesano, "Biological elements carry out optical tasks in coherent imaging systems," Proc. SPIE 9717, Adaptive Optics and Wavefront Control for Biological Systems II, 97170T (Presented at SPIE BiOS: February 14, 2016; Published: 15 March 2016); https://doi.org/10.1117/12.2210939.
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