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Caojin Yuan1, Hongchen Zhai, Haitao Liu

  • 1Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education China, Nankai University, Tianjin, China.

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This study introduces a novel aperture-synthesis technique for pulsed digital holography, enhancing image resolution. The method uses a single laser pulse for multiplexed illumination and records multiple subholograms for effective resolution improvement.

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Area of Science:

  • Optical Engineering
  • Holography
  • Superresolution Imaging

Background:

  • Pulsed digital holography (PDH) systems are crucial for capturing dynamic events.
  • Achieving superresolution in PDH often requires complex setups or multiple measurements.
  • Existing methods face limitations in spatial frequency coverage and resolution enhancement.

Purpose of the Study:

  • To propose and demonstrate a novel aperture-synthesis approach for superresolution in pulsed digital holography.
  • To enable simultaneous recording of multiple subholograms with different spatial frequency ranges in a single CCD frame.
  • To enhance the resolution of reconstructed images in PDH systems.

Main Methods:

  • A single laser pulse is divided into two subpulse trains.
  • Angular multiplexing is applied to both reference (carrier frequency) and object beams (on-axis/off-axis illumination).
  • Multiple subholograms covering diverse spatial frequencies are recorded in a single CCD frame.

Main Results:

  • The proposed aperture-synthesis method effectively improves image resolution.
  • Simultaneous recording of multiple subholograms is achieved in a single frame.
  • The reconstructed image quality benefits from synthesizing complex amplitudes of recorded subholograms.

Conclusions:

  • The developed technique offers an efficient way to achieve superresolution in pulsed digital holography.
  • This method simplifies the experimental setup by using a single laser pulse.
  • The approach provides a significant advancement in high-resolution holographic imaging.