A self-calibrated single fiber scanning projectors

Abstract

Pico projector has the advantages of small size, large field of view, and wide color gamut, suitable in AR or VR displaying. In this study, we reported a single-fiber scanning projector, which can sweep a modulated laser beam to form an image via a PZT tube. However, PZT is sensitive to environmental temperature, the change of temperature will lead to the unexpected shifts of optical fiber scanning trajectory and finally affect the quality of the projection. In order to solve this problem, proposed a self-calibration system which can automatically adjust the PZT drive signal and achieve constant fiber scanning trajectory under different ambient temperatures by combining piezoelectric self-induction and reinforcement learning (RL).