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Fast generation of arbitrary optical focus array
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DOI：10.1016/j.optlaseng.2022.107405.png)
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摘要
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We report a novel method to generate arbitrary optical focus arrays (OFAs). Our approach rapidly produces computer-generated holograms (CGHs) to precisely control the positions and the intensities of the foci. This is achieved by replacing the fast Fourier transform (FFT) operation in the conventional iterative Fourier-transform algorithm (IFTA) with a linear algebra one, identifying/removing zero elements from the matrices, and employ-ing a generalized weighting strategy. On the premise of accelerating the calculation speed by > 70 times, we demonstrate OFA with 99% intensity precision in the experiment. Our method proves effective and is applicable to systems in which real-time OFA generation is essential.
Keyword:
Optical focus array
Computer-generated hologram
Diffractive optics
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3.7
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7.3K
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