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Schematic of a time domain a/LCI system. Axial translation of retroreflector (RR) scans the pathlength of the reference arm to enable optical sectioning via coherence gating. Lenses L1–L4 are configured as shown to permit a collimated incident on the sample, and L4 to lie in the image plane of the scattered light (shaded). By scanning L4, the intensity of scattered light is mapped as a function of the scattering angle. Taken from [19].
