1. Direct inverse linearization of piezoelectric actuator’s initial loading curve and its applications in full-field optical coherence tomography (FF-OCT)

    Direct inverse linearization of piezoelectric actuator’s initial loading curve and its applications in full-field optical coherence tomography (FF-OCT)

    Abstract Piezoelectric actuator (PEA) has become popular in spectroscopic optical coherence tomography (SOCT) as it can provide depth dependent spectra with sub‐nanometer positioning resolution. However, the inherent hysteresis of the PEA introduces unwanted distortions to the obtained spectra and image. OCT imaging can be completed during the first forward motion of the PEA, i.e., the initial loading curve (ILC). Therefore, this paper proposes a feedforward hysteresis compensation method for the linearization of the ILC, aiming at improving the spectroscopic and imaging accuracy of OCT without any feedback on the PEA’s displacement or feedback controllers. A polynomial operator ...

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