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Related Experiment Video

Updated: Jan 17, 2026

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
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Quasi-non-diffraction single-pixel imaging enabled by spatial multiplexing holography.

Ziyi Zhuang, Chaoxu Chen, Haoyu Zhuang

    Optics Letters
    |September 16, 2025
    PubMed
    Summary
    This summary is machine-generated.

    Spatial-multiplexing holography (SMH)-based single-pixel imaging (SPI) offers a faster, cheaper alternative to conventional methods. This new SPI technique accurately reconstructs targets using a single device and pattern sequence.

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    Area of Science:

    • Computational imaging
    • Optical sensing

    Background:

    • Conventional single-pixel imaging (SPI) relies on complex multi-scale scanning and auxiliary sensors.
    • This leads to high time complexity and increased costs in target detection.

    Purpose of the Study:

    • To propose and experimentally demonstrate a novel spatial-multiplexing holography (SMH)-based SPI detection scheme.
    • To achieve accurate target reconstruction over a fixed distance range with reduced complexity.

    Main Methods:

    • Projection of non-diffractive patterns using a single spatial-multiplexing device.
    • Utilized 16x16 Hadamard patterns within a 0.4-0.5m range.
    • Applied Hadamard matrix pseudo-inverse for image reconstruction.

    Main Results:

    • Extended the range of clearly projected patterns (SSIM ≥ 0.755) from a single point to 0.1m.
    • Achieved up to a 200% increase in average SSIM at 0.5m.
    • Demonstrated an average SSIM gain of 177% across the 0.4-0.5m range.

    Conclusions:

    • SMH-based SPI provides an efficient and accurate method for sensing unknown targets.
    • This approach significantly improves reconstruction quality and extends the effective range compared to conventional SPI.