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Phase Retrieval and Imaging Science Group
Prof. James R. Fienup

News Flash: Bolcar wins Outstanding Paper Award. At the 2008 Frontiers in Optics (OSA Annual Meeting), Matt Bolcar won an FiO Outstanding Student Paper Award. Additionally, Tom Zielinski and Manuel Guizar were among the finalists in that competition.

News Flash: Guizar wins Major SPIE Scholarship. The SPIE has announced that Manuel Guizar-Sicairos won the 2nd Place SPIE Scholarship, the Society's second largest.

Recently Published Papers by Abbie Tippie : A.E. Tippie and J.R. Fienup, “Phase-error Correction for Multiple Planes using a Sharpness Metric,” Opt Lett. 34, 701-703 (2009).

Recently Published Papers by Sapna Shroff: "Phase Shift Estimation in Sinusoidally Illuminated Images for Lateral Superesolution," J.Opt.Soc.Am A 26, 413-424 (2009).

Recently Published Papers by Manuel Guizar-Sicairos: "Measurment of coherent x-ray focused beams by phase retrieval with transverse translation diversity," Opt. Express 17, 2670-2685 (2009).
“Direct image reconstruction from a Fourier intensity pattern using HERALDO,” Opt. Lett. 33, 2668-2670 (2008).
“Phase retrieval with transverse translation diversity: a nonlinear optimization approach,” Opt. Express 16, 7264-78 (12 May 2008).
“Phase Retrieval with Fourier-weighted Projections,” J. Opt. Soc. Am. A, 25, 701-709 (2008).

By Manuel Guizar-Sicairos and Sam Thurman, “Efficient Subpixel Image Registration Algorithms,” Opt. Lett. 33, 156-158 (2008).

By Sam Thurman: “Phase Retrieval with Signal Bias, J. Opt. Soc. Am A 26, 1008-1014 (2009).
“Fizeau Fourier transform imaging spectroscopy: missing data reconstruction,” Opt. Express 16, 6631-6645 (2008).
"Phase-error correction in digital holography," J. Opt. Soc. Am. A 25, 983-994 (2008);
"Correction of anisoplanatic phase errors in digital holography," J. Opt. Soc. Am. A 25, 995-999 (2008).

By Matt Bolcar: “Sub-aperture piston phase diversity for segnented and multi-aperture systems,” Appl. Opt. 48, A5-A12 (2009).

By Greg Brady: “Measurement Range of Phase Retrieval in Optical Surface and Wavefront Metrology,” Appl. Opt. 48, 442-449, (2009).
G.R. Brady, M. Guizar-Sicairos and J.R. Fienup, “Optical Wavefront Measurement using Phase Retrieval with Transverse Translation Diversity,” Opt. Express 17, 624-639 (2009).

By Seung-Whan Bahk: “Spot-shadowing optimization to mitigate damage growth in a high-energy-laser amplifier chain,” Appl. Opt. 47, 6586-6593 (2008).


(PDFs of these papers can be downloaded from our web site after clicking on the Publications box to the left.)

The Phase Retrieval and Imaging Science Group in the Intitute of Optics at the University of Rochester performs research in the areas of unconventional imaging, phase retrieval, wave-front sensing, imaging with sparse-aperture telescopes, and image reconstruction algorithms.

NASA's James Webb Space Telescope will need phase retrieval to align the 18 segments of the primary mirror. Similar phase retrieval algorithms were used to determine how to fix the Hubble Space Telescope.
NASA's Terrestrial Planet Finder will need phase retrieval for alignment of multiple (possibly flying-in-formation) interferometric imaging telescopes, and image reconstruction algorithms to undo image blurring due to sparse-aperture effects.
Phase retrieval algorithms can be used to perform optical metrology, testing aspheric optical surfaces during their manufacture with a simple system not requiring a null lens.
Phase retrieval algorithms can be used to reconstruct fine-resolution images of satellites and astronomical objects, despite the blurring effects of atmospheric turbulence.
Image sharpening algorithms can be used to estimate multiple phase screens throughout a volume of turbulence and reconstruct fine-resolution images of objects, despite the space-variant blurring effects of atmospheric turbulence.
Telescopes having sparse apertures or made up of an array of multiple smaller telescopes can give fine resolution images, while having large savings on size and weight. Image restoration and phase retrieval (to align the sub-apertures) are needed to achieve good quality imagery.

 

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