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Area of Science:

  • Optics and Photonics
  • Image Reconstruction
  • Metrology

Background:

  • Conventional imaging captures only light intensity, omitting crucial phase information.
  • Existing phase retrieval methods often involve bulky setups, multiple measurements, or require prior scene knowledge.
  • Phase information is vital for applications like label-free microscopy and optical metrology.

Purpose of the Study:

  • To develop a compact and efficient system for complex amplitude imaging.
  • To overcome limitations of existing phase retrieval techniques.
  • To enable phase information recovery in a single shot without prior knowledge.

Main Methods:

  • Utilized a single-layer metalens to generate spatially multiplexed and polarization phase-shifted point spread functions.
  • Integrated the metalens with a polarization camera for simultaneous recording of four polarization shearing interference patterns.
  • Employed an incoherent light-emitting diode for illumination, enabling speckle-noise-free imaging.

Main Results:

  • Demonstrated deterministic reconstruction of the complex amplitude light field in a single shot.
  • Achieved speckle-noise-free complex amplitude imaging for both static and moving objects.
  • Showcased tailored magnification ratio and field of view capabilities.

Conclusions:

  • The proposed miniaturized and robust system enables complex amplitude imaging with reduced complexity.
  • This technology has potential for integration into portable devices for point-of-care applications.
  • The single-shot, label-free imaging capability advances optical metrology and microscopy.