Quantitative phase imaging endoscopy with a metalens

Aamod Shanker; Johannes E. Fröch; Saswata Mukherjee; Maksym Zhelyeznyakov; Steven L. Brunton; Eric J. Seibel; Arka Majumdar

doi:10.1038/s41377-024-01587-y

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Quantitative phase imaging endoscopy with a metalens

Original Articles

- Quantitative phase imaging endoscopy with a metalens
- Light: Science & Applications Vol. 13, Issue 12, Pages: 3196-3209(2024)
- Affiliations：
  
  1.Department of Electrical and Computer Engineering, University of Washington, Seattle, WA 98195, USA
  2.Center for Vision Science, University of Rochester, New York, NY 14623, USA
  3.Department of Mechanical Engineering, University of Washington, Seattle, WA 98105, USA
  4.Department of Physics, University of Washington, Seattle 98195, USA
- Author bio：
  
  Aamod Shanker (aamod@berkeley.edu)
  Arka Majumdar (arka@uw.edu)
- Funds：
- DOI：10.1038/s41377-024-01587-y
  CLC：
- Received：19 March 2024，
  
  Revised：13 August 2024，
  
  Accepted：2024-08-15，
  
  Published Online：08 November 2024，
  
  Published：31 December 2024
- Accepted：
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Shanker, A. et al. Quantitative phase imaging endoscopy with a metalens. Light: Science & Applications, 13, 3196-3209 (2024).
DOI：

Shanker, A. et al. Quantitative phase imaging endoscopy with a metalens. Light: Science & Applications, 13, 3196-3209 (2024). DOI： 10.1038/s41377-024-01587-y.

摘要

Abstract

Quantitative phase imaging (QPI) recovers the exact wavefront of light from intensity measurements. Topographical and optical density maps of translucent microscopic bodies can be extracted from these quantified phase shifts. We demonstrate quantitative phase imaging at the tip of a coherent fiber bundle using chromatic aberrations inherent in a silicon nitride hyperboloid metalens. Our method leverages spectral multiplexing to recover phase from multiple defocus planes in a single capture using a color camera. Our 0.5 mm aperture metalens shows robust quantitative phase imaging capability with a

$$ {28}^{\circ} $$

field of view and 0.

$$ {2}{\pi} $$

phase resolution (~ 0.

$$ {1}{\lambda} $$

in air) for experiments with an endoscopic fiber bundle. Since the spectr

al functionality is encoded directly in the imaging lens

the metalens acts both as a focusing element and a spectral filter. The use of a simple computational backend will enable real-time operation. Key limitations in the adoption of phase imaging methods for endoscopy such as multiple acquisition

interferometric alignment or mechanical scanning are completely mitigated in the reported metalens based QPI.

关键词

Keywords

references

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