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Schematic of the experimental setup for time-reversal–based optical focusing through scattering media. AOM, acousto-optic modulator; BS, beamsplitter; CL, camera lens; HWP, half-wave plate; L, lens; M, mirror; MS, mechanical shutter; PBS, polarizing beamsplitter; R, reference beam; S, sample beam; SLM, spatial light modulator; SM, scattering medium.
