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Large-array sub-millimeter precision coherent flash three-dimensional imaging.

Bin Wang1,2,3, Junze Tian1,2,3, Jianwei Wang4,5

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A new large-array coherent flash 3D imaging system achieves sub-millimeter range precision for accurate environmental perception. This advancement offers scalable, long-range high-precision 3D imaging for various applications.

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Area of Science:

  • Optics and Photonics
  • 3D Imaging Technologies
  • Sensor Development

Background:

  • High-precision 3D imaging is crucial for environmental perception and spatial awareness.
  • Solid-state LiDAR systems are promising but face challenges in depth precision, detection range, and scalability.
  • Existing technologies struggle to balance range, precision, and scalability.

Purpose of the Study:

  • To develop a large-array coherent flash 3D imaging system with enhanced depth precision and detection range.
  • To overcome the limitations of current 3D imaging technologies.
  • To demonstrate a scalable solution for long-range, high-precision 3D imaging.

Main Methods:

  • Utilized stepped-frequency modulation and coherent detection with Charge-Coupled Device (CCD) sensors.
  • Developed a novel coherent image sensor.
  • Constructed and demonstrated a prototype system.

Main Results:

  • Achieved sub-millimeter range precision (0.47 mm).
  • Demonstrated high depth precision over a long detection range (30.50 m).
  • System operates at a maximum frame rate of 10 Hz with 15.86 mW optical power, showing high sensitivity and pixel scalability.

Conclusions:

  • The developed system offers a scalable approach to long-range, high-precision 3D imaging.
  • Significant implications for deformation monitoring, virtual reality, and cultural heritage preservation.
  • Advances the field of 3D imaging by addressing key challenges in precision and scalability.