FIG. 3.2 Example schematics of (a) TD OCT and (b) FD OCT, specifically SD OCT. More about this image found in Example schematics of (a) TD OCT and (b) FD OCT, specifically SD OCT.

FIG. 9.2 Configurations of different types of OCT. (a) TD-OCT, (b) SD-OCT, (c) SS-OCT. More about this image found in Configurations of different types of OCT. (a) TD-OCT, (b) SD-OCT, (c) SS-OC...

FIG. 3.14 Comparison of OCT B-scans of a human retina obtained with (a) TD OCT (400 Hz A-scan rate, 10 µm axial resolution) and (b) SD OCT (30 kHz A-scan rate, 2 µm axial resolution), highlighting the improvements in image quality with SD OCT. Reprinted with permission from Wojtkowski, M., Appl... More about this image found in Comparison of OCT B-scans of a human retina obtained with (a) TD OCT (400 H...

FIG. 3.15 Schematic diagram of (a) a SS OCT system and (b) a SD OCT system with a single scatterer in the sample arm. More about this image found in Schematic diagram of (a) a SS OCT system and (b) a SD OCT system with a sin...

FIG. 3.18 Schematic diagram of (a) a SS OCT system and (b) a SD OCT system, with multiple scatterers in the sample arm. More about this image found in Schematic diagram of (a) a SS OCT system and (b) a SD OCT system, with mult...

FIG. 3.23 Schematic diagrams of (a) FF OCT and (b) LF OCT. SLD: superluminescent diode. More about this image found in Schematic diagrams of (a) FF OCT and (b) LF OCT. SLD: superluminescent diod...

FIG. 4.4 Decomposing the OCT signal in Fig. 4.3 . [(a) and (b)] The separate OCT signals from the two scatterers located around z = 50 µm in Fig. 4.3 . (c) The total OCT signal, which is the sum of (a) and (b), where (a) and (b) sum constructively and produce bright speckle. [(d) and (e)] The separate OCT signals from the two scatterers located around z = 80 µm in Fig. 4.3 . (f) The total OCT signal, which is the sum of (d) and (e), where (d) and (e) sum destructively and produce dark speckle. The envelope, real component, and imaginary component are shown by the black, blue, and red lines, respectively. More about this image found in Decomposing the OCT signal in Fig. 4.3 . [(a) and (b)] The separate OCT si...

FIG. 4.17 (a) OCT and (b) speckle-modulating (SM) OCT B-scans of a mouse cornea. (c) and (d) are magnified views of the regions indicated by yellow boxes in (a) and (b), respectively. (e) Microscope image of hematoxylin and eosin (H&E) stained mouse cornea at ten times magnification. Scale bar: 100 µm. Adapted from Liba, O. et al., Nat. Commun. 8 (1), 15845 (2017). Copyright 2017 Springer Nature. More about this image found in (a) OCT and (b) speckle-modulating (SM) OCT B-scans of a mouse cornea. (c) ...

FIG. 5.4 Illustrating the variation in OCT phase as a function of SNR. An OCT phasor (green arrow), 100 independent noise realizations (red dots), and a single OCT phasor measurement (black arrow) with associated noise realization (blue arrow) for SNRs of (a) 1 dB, (b) 10 dB, and (c) 25 dB. (d) Co... More about this image found in Illustrating the variation in OCT phase as a function of SNR. An OCT phasor...

FIG. 9.3 The concept for SDM-OCT. (a) Schematic diagram of the prototype SDM-OCT system. The key of the technology is to create multiple illumination beams on the sample simultaneously while having different optical delays for each beam (see the red rectangular region). A single detection channel was used to collect signals from all beams simultaneously. (b) A 1 × 8 fiber array with 300 µm spacing between individual fibers was used in the prototype system. (c) Each beam was optically delayed. Signals from different beams (different sample locations) were presented at different frequency range (i.e., imaging depth). For simplicity, only four beams are shown. Adapted from Zhou, C. et al., Opt. Express 21 (16), 19219–19227 (2013). Copyright 2013 Optica Publishing Group. More about this image found in The concept for SDM-OCT. (a) Schematic diagram of the prototype SDM-OCT sys...