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High-speed LED array grayscale modulation method for three-dimensional profilometry with defocused projection
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DOI：10.1016/j.optlastec.2025.114021.png)
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Abstract
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• A new strategy for high-speed and high-accuracy 3D measurements. • Resolved the inherent limitation between grayscale level and projection speed in DMD-based projectors. • The employed self-developed 25 MHz LED array can achieve 1000-fold speedup compared to DMD. • Proposed a grayscale modulation method suitable for high-speed LED arrays with low resolution. • Achieved 73.2 % accuracy boost in near-focus area.
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