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Extended depth-of-field projection method using a high-speed projector with a synchronized oscillating variable-focus lens

Abstract

For a projector-based virtual reality (VR) or augmented reality (AR) display, a large depth of field and a high-speed image refresh rate are important keys to improve the projector’s performance. Here, we propose a solution that extends the depth of field of the projection using a variable-focus lens and a high-speed projector as well as a control method that synchronizes oscillation of the variable-focus lens with the high-speed projector. The experiment confirms that the proposed system can project the well-focused and dynamically changeable contents on six different planes. Its projection range varies from 0.3 m to 1.5 m, and the refresh rate is 166.7 Hz.

© 2021 Optical Society of America

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Supplementary Material (2)

NameDescription
Code 1       The gradients were calculated by using Matlab. Matlab code and the raw images could be found in included files.
Visualization 1       Video of experimental result for multi-panels projection.

Data Availability

Data underlying the results presented in this paper are available in Visualization 1 and Code 1, Ref. [24].

24. H. Xu, L. Wang, S. Tabata, Y. Watanabe, and M. Ishikawa, “Matlab code,” figshare, (2021), https://doi.org/10.6084/m9.figshare.13653572.

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