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. 2023 Jun 21;14(7):3491–3505. doi: 10.1364/BOE.488663

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Fig. 3. — Illustration of differences between D-FFOCT and iSR D-FFOCT. Two en-face images at the same location and depth (ΔZ = 0.8 µm) are displayed using D-FFOCT (a) and iSR D-FFOCT (b). No fringe artefacts are present when using iSR D-FFOCT (b) unlike D-FFOCT (a). Signal strength (Brightness) is evaluated at different distances from the coverslip (ΔZ), on a 3D sample using D-FFOCT (c) and iSR D-FFOCT (d) with an 810 nm source (blue traces) and a 730 nm source (orange traces). e: Stability of D-FFOCT (orange trace) and iSR D-FFOCT (blue trace) is assessed using the mean frequency (Hue) at different depths using the LED at 730 nm.