摘要: 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 employing 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 for the systems in
which real-time OFA generation is essential.