Heatmap from Scientific Research

Relative excitation light (465 nm) intensity modeled as a function of distance from the optical fiber tip for a standard 200-μm diameter, 0.37-NA fiber (top) and the 50-μm diameter fibers used in our arrays42 (bottom). Intensity values are shown only for locations estimated to achieve a power density sufficient to activate ChR2 (1 mW/mm2).

DOI