RT Journal Article
SR Electronic
T1 SAVI: Synthetic apertures for long-range, subdiffraction-limited visible imaging using Fourier ptychography
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP e1602564
DO 10.1126/sciadv.1602564
VO 3
IS 4
A1 Holloway, Jason
A1 Wu, Yicheng
A1 Sharma, Manoj K.
A1 Cossairt, Oliver
A1 Veeraraghavan, Ashok
YR 2017
UL http://advances.sciencemag.org/content/3/4/e1602564.abstract
AB Synthetic aperture radar is a well-known technique for improving resolution in radio imaging. Extending these synthetic aperture techniques to the visible light domain is not straightforward because optical receivers cannot measure phase information. We propose to use macroscopic Fourier ptychography (FP) as a practical means of creating a synthetic aperture for visible imaging to achieve subdiffraction-limited resolution. We demonstrate the first working prototype for macroscopic FP in a reflection imaging geometry that is capable of imaging optically rough objects. In addition, a novel image space denoising regularization is introduced during phase retrieval to reduce the effects of speckle and improve perceptual quality of the recovered high-resolution image. Our approach is validated experimentally where the resolution of various diffuse objects is improved sixfold.