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

Hongjin Xu; Lihui Wang; Satoshi Tabata; Yoshihiro Watanabe; Masatoshi Ishikawa

doi:10.1117/12.2542477

26 February 2020 An extended depth-of-field projection method using a high-speed projector with a synchronized oscillating variable focus lens

Hongjin Xu, Lihui Wang, Satoshi Tabata, Yoshihiro Watanabe, Masatoshi Ishikawa

Author Affiliations +

Proceedings Volume 11304, Advances in Display Technologies X; 113040T (2020) https://doi.org/10.1117/12.2542477
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

An extended depth-of-field projection is needed for spatial augmented reality. However, conventional projectors are often designed with a small F/#, which causes a narrow depth-of-field. This paper presents a new system consisting of a variable focus optical path and 1000-fps 8-bit high-speed projector. This system oscillates the focal length of the lens at high speed and synchronizes it with the projection. High speed performance contributes to project clear images even under the oscillated focal length and to realize all-in-focus projections on more than 10 targets at different depths.

Citation Download Citation

Hongjin Xu, Lihui Wang, Satoshi Tabata, Yoshihiro Watanabe, and Masatoshi Ishikawa "An extended depth-of-field projection method using a high-speed projector with a synchronized oscillating variable focus lens", Proc. SPIE 11304, Advances in Display Technologies X, 113040T (26 February 2020); https://doi.org/10.1117/12.2542477

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