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. Author manuscript; available in PMC: 2018 Apr 20.
Published in final edited form as: Optica. 2018 Jan 20;5(1):36–43. doi: 10.1364/OPTICA.5.000036

Fig. 2.

Fig. 2

(a) Schematic of cycloid scanning geometry when unwrapped on to a flat plane. The red dots indicate spots of each circle scanned at equal temporal frame intervals, showing the slow local rotation of the circle about its center during the scan due to the mirror inversion effect. (b) 3D plot of the cycloid scan in the device geometry. (c) Ultrahigh-speed OCT system. HVA: high-voltage amplifier. AWG: arbitrary waveform generator. C: circulator. RM: reference mirror. P: photodetector. OC: optical clock. DA: differential amplifier.