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Measurements of SFDI modulation patterns at a single illumination phase before demodulation. Modulation patterns (λ = 600 nm) at six discrete spatial frequencies reflected from (a) Spectralon and (b) the turbid phantom. (c) Modulation depth of each pattern shown in (a) as circles and in (b) as triangles with fitted curves, becoming unusable ~fx > 1.5 mm−1.
