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<p>Compound eyes (CEs), renowned for their extraordinary visual capabilities, offer significant potential for advanced micro-optical systems. However, their applications in wide field-of-view (FOV) imaging and dynamic tracking, for instance, microscopic particle image velocimetry (μ-PIV) for microfluidics, remain constrained by limited spatial resolution. We present a compound eye-on-a-chip (CEoC) system integrating a seven-ommatidium CE with a microfluidic platform. When fabricated via femtosecond laser two-photon polymerization (TPP), the CE exhibits exceptional surface smoothness (&lt;4 nm roughness) and achieves wide-FOV imaging (&gt;120°) with submicrometer resolution. Through quantitative calibration using TPP-fabricated microstructures, we established precise 3D spatial positioning capabilities. Proof-of-concept μ-PIV experiments using fluorescent microparticles successfully reconstructed high-speed trajectories (10 mm/s) from real-time CE-captured images. This integrated CEoC system has promising potential for advancing microfluidic analysis and optofluidic manipulation technologies.</p>

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Compound eyes-on-a-chip for large field-of-view imaging and dynamic target positioning

  • 期刊论文

  • 发表日期：

    2025年9月11日

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  • Jiayi Wan,
  • Weijian Zhong,
  • Yuqing Liu,
  • Changxu Li,
  • Dongdong Han,
  • Yonglai Zhang

摘要

Compound eyes (CEs), renowned for their extraordinary visual capabilities, offer significant potential for advanced micro-optical systems. However, their applications in wide field-of-view (FOV) imaging and dynamic tracking, for instance, microscopic particle image velocimetry (μ-PIV) for microfluidics, remain constrained by limited spatial resolution. We present a compound eye-on-a-chip (CEoC) system integrating a seven-ommatidium CE with a microfluidic platform. When fabricated via femtosecond laser two-photon polymerization (TPP), the CE exhibits exceptional surface smoothness (<4 nm roughness) and achieves wide-FOV imaging (>120°) with submicrometer resolution. Through quantitative calibration using TPP-fabricated microstructures, we established precise 3D spatial positioning capabilities. Proof-of-concept μ-PIV experiments using fluorescent microparticles successfully reconstructed high-speed trajectories (10 mm/s) from real-time CE-captured images. This integrated CEoC system has promising potential for advancing microfluidic analysis and optofluidic manipulation technologies.