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. Author manuscript; available in PMC: 2019 Dec 1.
Published in final edited form as: J Neural Eng. 2018 Aug 21;15(6):066002. doi: 10.1088/1741-2552/aadbb2

Figure 1. Bundles of microfibers as a potential deep brain optical interface.

Figure 1.

(a) The polished imaging surface is mounted in a traditional fluorescence microscope, while individual fibers with a diameter as small as 6.8 μm are implanted into the brain. (b) The polished imaging surface that connects with the microscope. (c) A bundle of 18,000 fibers. (d) Light propagates with near total internal reflection, allowing it to deliver and collect light at the tips of the fibers. Six fibers are shown in a fluorescein solution, with pink lines added to emphasize fiber path.