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Proceedings Paper

An extended depth-of-field projection method using a high-speed projector with a synchronized oscillating variable focus lens
Author(s): Hongjin Xu; Lihui Wang; Satoshi Tabata; Yoshihiro Watanabe; Masatoshi Ishikawa
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Paper 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.

Paper Details

Date Published: 26 February 2020
PDF: 7 pages
Proc. SPIE 11304, Advances in Display Technologies X, 113040T (26 February 2020); doi: 10.1117/12.2542477
Show Author Affiliations
Hongjin Xu, Tokyo Institute of Technology (Japan)
Lihui Wang, Guangdong Institute of Semiconductor Industrial Technology (Japan)
Satoshi Tabata, The Univ. of Tokyo (Japan)
Yoshihiro Watanabe, Tokyo Institute of Technology (Japan)
Masatoshi Ishikawa, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 11304:
Advances in Display Technologies X
Jiun-Haw Lee; Qiong-Hua Wang; Tae-Hoon Yoon, Editor(s)

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