We discuss the characterization and analysis of ultrasonically sculpted virtual optical waveguides in scattering media using a novel physics-based renderer. Our renderer is physically accurate, unbiased, and fast. Unlike other simulators, our renderer can handle heterogeneous refractive index profiles in scattering media. Using the renderer, we characterized the effect of different parameters of virtual optical waveguides to enhance the overall light throughput in transparent and scattering media. The simulator can potentially be used for analysis-by-synthesis and design of innovative acousto-optics systems, capable of generating complex virtual elements in scattering media.
We present a novel technique to extend the focal length of an external lens without increasing the spot size using virtual optical waveguides ultrasonically sculpted in transparent and turbid media. When used in tandem with an external lens, these non-invasive virtual waveguides can further relay the focused beam of light into the medium without losing the spatial resolution. We will also show how the optical properties of this physical-virtual cascade system can be reconfigured by changing the pattern of ultrasound. This method can find intriguing applications for manipulating the trajectory of light in transparent and turbid media, including biological tissue.
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