Current Optics and Photonics

  • 제5권6호
  • /
  • Pages.606-616
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  • 2021
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  • 2508-7266(pISSN)
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  • 2508-7274(eISSN)
한국광학회 (Optical Society of Korea)
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Spatial Frequency Coverage and Image Reconstruction for Photonic Integrated Interferometric Imaging System

  • Zhang, Wang (School of Mechanical and Aerospace Engineering, Jilin University) ;
  • Ma, Hongliu (School of Mechanical and Aerospace Engineering, Jilin University) ;
  • Huang, Kang (School of Mechanical and Aerospace Engineering, Jilin University)
  • 투고 : 2021.06.25
  • 심사 : 2021.09.07
  • 발행 : 2021.12.25
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초록

A photonic integrated interferometric imaging system possesses the characteristics of small-scale, low weight, low power consumption, and better image quality. It has potential application for replacing conventional large space telescopes. In this paper, the principle of photonic integrated interferometric imaging is investigated. A novel lenslet array arrangement and lenslet pairing approach are proposed, which are helpful in improving spatial frequency coverage. For the novel lenslet array arrangement, two short interference arms were evenly distributed between two adjacent long interference arms. Each lenslet in the array would be paired twice through the novel lenslet pairing approach. Moreover, the image reconstruction model for optical interferometric imaging based on compressed sensing was established. Image simulation results show that the peak signal to noise ratio (PSNR) of the reconstructed image based on compressive sensing is about 10 dB higher than that of the direct restored image. Meanwhile, the normalized mean square error (NMSE) of the direct restored image is approximately 0.38 higher than that of the reconstructed image. Structural similarity index measure (SSIM) of the reconstructed image based on compressed sensing is about 0.33 higher than that of the direct restored image. The increased spatial frequency coverage and image reconstruction approach jointly contribute to better image quality of the photonic integrated interferometric imaging system.

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