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. 2019 Jan 18;10(1):67. doi: 10.3390/mi10010067

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Lissajous scanning patterns and theoretical trajectory depending on different scanning frequencies. (a) Optical images of the Lissajous scanning patterns depending on different scanning frequencies (1/50 s). (b) Pattern-projected image of the geese. The Lissajous scanning pattern of (a) was projected onto the image of geese. (c) Theoretical analysis of Lissajous laser trajectory depending on different scanning frequencies at 1/50 s. Simulation was conducted using MATLAB R2017a and the source image had a 256 × 256 pixel resolution. Compared to resonance scanning, scanning at the selected frequencies of 5450 Hz and 6700 Hz provided a high fill factor with a high frame rate.