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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 11 — Jun. 2, 2014
  • pp: 13586–13599

Aperture-scanning Fourier ptychography for 3D refocusing and super-resolution macroscopic imaging

Siyuan Dong, Roarke Horstmeyer, Radhika Shiradkar, Kaikai Guo, Xiaoze Ou, Zichao Bian, Huolin Xin, and Guoan Zheng  »View Author Affiliations

Optics Express, Vol. 22, Issue 11, pp. 13586-13599 (2014)

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We report an imaging scheme, termed aperture-scanning Fourier ptychography, for 3D refocusing and super-resolution macroscopic imaging. The reported scheme scans an aperture at the Fourier plane of an optical system and acquires the corresponding intensity images of the object. The acquired images are then synthesized in the frequency domain to recover a high-resolution complex sample wavefront; no phase information is needed in the recovery process. We demonstrate two applications of the reported scheme. In the first example, we use an aperture-scanning Fourier ptychography platform to recover the complex hologram of extended objects. The recovered hologram is then digitally propagated into different planes along the optical axis to examine the 3D structure of the object. We also demonstrate a reconstruction resolution better than the detector pixel limit (i.e., pixel super-resolution). In the second example, we develop a camera-scanning Fourier ptychography platform for super-resolution macroscopic imaging. By simply scanning the camera over different positions, we bypass the diffraction limit of the photographic lens and recover a super-resolution image of an object placed at the far field. This platform’s maximum achievable resolution is ultimately determined by the camera’s traveling range, not the aperture size of the lens. The FP scheme reported in this work may find applications in 3D object tracking, synthetic aperture imaging, remote sensing, and optical/electron/X-ray microscopy.

© 2014 Optical Society of America

OCIS Codes
(100.3190) Image processing : Inverse problems
(100.6640) Image processing : Superresolution
(110.0110) Imaging systems : Imaging systems
(170.0180) Medical optics and biotechnology : Microscopy
(090.1995) Holography : Digital holography

ToC Category:
Imaging Systems

Original Manuscript: April 3, 2014
Revised Manuscript: May 14, 2014
Manuscript Accepted: May 15, 2014
Published: May 29, 2014

Virtual Issues
Vol. 9, Iss. 8 Virtual Journal for Biomedical Optics

Siyuan Dong, Roarke Horstmeyer, Radhika Shiradkar, Kaikai Guo, Xiaoze Ou, Zichao Bian, Huolin Xin, and Guoan Zheng, "Aperture-scanning Fourier ptychography for 3D refocusing and super-resolution macroscopic imaging," Opt. Express 22, 13586-13599 (2014)

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