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Journal of Biomedical Optics

Reflective Fourier ptychography
Author(s): Shaun Pacheco; Guoan Zheng; Rongguang Liang
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Paper Abstract

The Fourier ptychography technique in reflection mode has great potential applications in tissue imaging and optical inspection, but the current configuration either has a limitation on cut-off frequency or is not practical. By placing the imaging aperture stop outside the illumination path, the illumination numerical aperture (NA) can be greater than the imaging NA of the objective lens. Thus, the cut-off frequency achieved in the proposed optical system is greater than twice the objective’s NA divided by the wavelength (2NAobj/λ), which is the diffraction limit for the cut-off frequency in an incoherent epi-illumination configuration. We experimentally demonstrated that the synthesized NA is increased by a factor of 4.5 using the proposed optical concept. The key advantage of the proposed system is that it can achieve high-resolution imaging over a large field of view with a simple objective. It will have a great potential for applications in endoscopy, biomedical imaging, surface metrology, and industrial inspection.

Paper Details

Date Published: 18 February 2016
PDF: 6 pages
J. Biomed. Opt. 21(2) 026010 doi: 10.1117/1.JBO.21.2.026010
Published in: Journal of Biomedical Optics Volume 21, Issue 2
Show Author Affiliations
Shaun Pacheco, College of Optical Sciences, The Univ. of Arizona (United States)
Guoan Zheng, Univ. of Connecticut (United States)
Rongguang Liang, College of Optical Sciences, The Univ. of Arizona (United States)


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