Reflective Fourier ptychography

Shaun Pacheco, Guoan Zheng, Rongguang Liang

Research output: Contribution to journalArticle

23 Citations (Scopus)

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.

Original languageEnglish (US)
Article number026010
JournalJournal of Biomedical Optics
Volume21
Issue number2
DOIs
StatePublished - Feb 1 2016

Fingerprint

numerical aperture
Imaging techniques
Cutoff frequency
cut-off
illumination
Lighting
inspection
Inspection
configurations
Endoscopy
metrology
field of view
Optical systems
apertures
lenses
Lenses
Diffraction
high resolution
Tissue
Wavelength

Keywords

  • coherence imaging
  • Fourier optics and signal processing
  • microscopy

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Reflective Fourier ptychography. / Pacheco, Shaun; Zheng, Guoan; Liang, Rongguang.

In: Journal of Biomedical Optics, Vol. 21, No. 2, 026010, 01.02.2016.

Research output: Contribution to journalArticle

Pacheco, Shaun ; Zheng, Guoan ; Liang, Rongguang. / Reflective Fourier ptychography. In: Journal of Biomedical Optics. 2016 ; Vol. 21, No. 2.
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