Defocused spatial diversity technology with aperture scanning for aberration detection and image restoration in aberrated imaging systems

Li Dong; Haotong Ma; Qi Peng; Ge Ren; Bo Qi; Zongliang Xie; Shanchao Liu

doi:10.1117/1.OE.57.8.083108

31 August 2018 Defocused spatial diversity technology with aperture scanning for aberration detection and image restoration in aberrated imaging systems

Li Dong, Haotong Ma, Qi Peng, Ge Ren, Bo Qi, Zongliang Xie, Shanchao Liu

Author Affiliations +

Optical Engineering, Vol. 57, Issue 8, 083108 (August 2018). https://doi.org/10.1117/1.OE.57.8.083108

Abstract

The resolution of an optical imaging system is often limited by various phase aberrations. To get the joint estimation of an object and aberrations of an imaging system with perturbations, a defocused spatial diversity technology with aperture scanning was proposed and evaluated. This technology creates spatial diversity images by scanning an aperture in the defocused plane of the aberrated imaging system. Based on these diversity images, the stochastic parallel gradient descent algorithm was used to recover the phase aberration of the imaging system by adaptively optimizing the coefficients of Zernike polynomials. Then the near-diffraction-limited image of the object can be restored using a multiframe Winner–Helstrom filter. Numerical simulations performed with different phase distributions validated the technology. The technology proposed may be widely used in aberrated imaging systems for aberration detection and image restoration.

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Li Dong, Haotong Ma, Qi Peng, Ge Ren, Bo Qi, Zongliang Xie, and Shanchao Liu "Defocused spatial diversity technology with aperture scanning for aberration detection and image restoration in aberrated imaging systems," Optical Engineering 57(8), 083108 (31 August 2018). https://doi.org/10.1117/1.OE.57.8.083108

Received: 1 May 2018; Accepted: 7 August 2018; Published: 31 August 2018

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