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Optical singularity protractor for rotating metrology with neuromorphic sensing.

Zhe Weng1,2, Yiyu Zhao1,2, Zhiming Qing1,2

  • 1National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing, China.

Light, Science & Applications
|July 14, 2026
PubMed
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This study introduces the Optical Singularity Protractor (OSinP) for robust rotational speed sensing. It uses optical singularities and neuromorphic computing to overcome alignment issues in traditional methods.

Area of Science:

  • Optics and Photonics
  • Metrology
  • Neuromorphic Engineering

Background:

  • Vortex beams and optical singularities enable advanced optical sensing applications.
  • Rotational Doppler effect sensing is limited by stringent axial alignment requirements.

Purpose of the Study:

  • To develop a novel rotational metrology technique using optical singularities.
  • To overcome limitations of traditional rotational Doppler sensing methods.

Main Methods:

  • Proposed the Optical Singularity Protractor (OSinP) technique.
  • Developed a real-time neuromorphic singularity perception system for microsecond-resolution data acquisition.
  • Tested OSinP under off-axis rotation and non-steady-state velocity conditions.

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Main Results:

  • OSinP effectively senses optical field rotation velocity using singularity angular velocity.
  • The system demonstrated robust performance under practical constraints like off-axis rotation.
  • Neuromorphic computing was integrated with topological structured light for dynamic rotation sensing.

Conclusions:

  • The OSinP technique offers a new approach to rotation sensing, distinct from traditional methods.
  • This technology holds promise for energy-efficient neuromorphic applications in fields like astronomical metrology and embodied intelligence.