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. 2020 Feb 5;11:710. doi: 10.1038/s41467-020-14514-7

Fig. 4. Noise suppression efficiency of space gating.

Fig. 4

a Ratio of the ballistic wave to the multiply scattered wave with space gating (τSG, blue) and without space gating (τ, red) as a function of the total optical thickness, Ltot/ls. Circular, triangular, and rectangular markers indicate cases of input layer optical thicknesses, Li/ls, fixed to 6.9, 10.0, and 10.6, respectively. The optical thickness of the output layer was also varied for each case. b Noise suppression factor η of space gating. η was obtained from τSG/τ in a.