Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Dennis F. Gardner"'
Publikováno v:
2020 IEEE Research and Applications of Photonics in Defense Conference (RAPID).
We integrate a commercial projector and camera into an optical super-resolution telescope. We employ a simple and robust image registration in combination with an incoherent Fourier Ptychography algorithm to generate resolution-enhanced images of obj
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8e28585625756f3744f66fad7d2b0da
https://doi.org/10.1109/rapid49481.2020.9195663
https://doi.org/10.1109/rapid49481.2020.9195663
Publikováno v:
Imaging and Applied Optics Congress.
Shack-Hartmann wavefront sensors are limited in turbulence by non-uniform illumination and branch points. We describe the Intensity/Slopes Network (ISNet), which reconstructs wavefronts from intensity and slope information, and demonstrate that it im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ab134d72a530ca7f079a7e3743def05
https://doi.org/10.1364/aoms.2020.jw4g.6
https://doi.org/10.1364/aoms.2020.jw4g.6
Publikováno v:
Conference on Lasers and Electro-Optics.
We demonstrate passive image recovery of mid-infrared thermal objects around comers using speckle correlation techniques.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e3d0b5f7835a09846284a2b3077e34c
https://doi.org/10.1364/cleo_qels.2020.fw4q.5
https://doi.org/10.1364/cleo_qels.2020.fw4q.5
Publikováno v:
Imaging and Applied Optics Congress.
We demonstrate speckle correlation imaging of broadband, mid-infrared ther mal objects through diffusers and around corners at resolutions near the diffraction limit.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd1077fe429ee342a3976e7a5653b265
https://doi.org/10.1364/cosi.2020.cth5c.4
https://doi.org/10.1364/cosi.2020.cth5c.4
Autor:
Daniel E. Adams, Christina L. Porter, Giulia F. Mancini, Margaret M. Murnane, Dennis F. Gardner, Benjamin R. Galloway, Elisabeth R. Shanblatt, Xiaoshi Zhang, Henry C. Kapteyn, Michael Tanksalvala, Robert Karl, Charles Bevis
Publikováno v:
Nature Photonics. 11:259-263
Coherent diffractive imaging of periodic samples is demonstrated with a tabletop, 13.5 nm high-harmonic source. With a novel image reconstruction technique, the record high spatial resolution of 12.6 nm is achieved in the extreme-ultraviolet region.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2172900379395bbe638e9372ac07b287
https://doi.org/10.1038/nphoton.2017.33
https://doi.org/10.1038/nphoton.2017.33
Autor:
Henry C. Kapteyn, Begoña Abad Mayor, Daniel E. Adams, Giulia F. Mancini, Margaret M. Murnane, Michael Tanksalvala, Travis Frazer, Dennis F. Gardner, Charles Bevis, Jorge N. Hernandez-Charpak, Elisabeth R. Shanblatt, Christina L. Porter, Joshua Knobloch, Karl Jr. Robert
Publikováno v:
EPJ Web of Conferences, Vol 205, p 04005 (2019)
We demonstrate the first stroboscopic full-field EUV nanoscope using high harmonics. We image the propagation of thermal and surface acoustic waves in nickel with 80nm transverse, 0.5 Å axial, and 10 fs resolution.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d390db11bbad99d5b5622da4ae01cee2
https://www.epj-conferences.org/articles/epjconf/pdf/2019/10/epjconf_up2019_04005.pdf
https://www.epj-conferences.org/articles/epjconf/pdf/2019/10/epjconf_up2019_04005.pdf
Publikováno v:
Imaging and Applied Optics 2019 (COSI, IS, MATH, pcAOP).
We image extended samples using speckle correlations. To enable this advance, we collected several speckle patterns from a sample while it is raster-scanned through the pseudothermal illumination and use ptychography to reconstruct an image.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d7cd9bcba1c33e70f4f75bd6eb1bb65
https://doi.org/10.1364/cosi.2019.cw3a.2
https://doi.org/10.1364/cosi.2019.cw3a.2
Publikováno v:
Frontiers in Optics + Laser Science APS/DLS.
Speckle correlation imaging offers the ability to see targets around corners without needing nearby calibration objects. Here, we demonstrate high-resolution recovery of mid-infrared targets around corners using bispectrum methods.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f9a3348102248fcf6f88c8f77c0f9ab
https://doi.org/10.1364/fio.2019.fth3f.3
https://doi.org/10.1364/fio.2019.fth3f.3
Autor:
Henry C. Kapteyn, Robert Karl, Dennis F. Gardner, Elisabeth R. Shanblatt, Margaret M. Murnane, Charles Bevis, Christina L. Porter, Giulia F. Mancini, Victor Vartanian, Michael Tanksalvala, Daniel E. Adams
Publikováno v:
Nano Letters
We demonstrate quantitative, chemically specific imaging of buried nanostructures, including oxidation and diffusion reactions at buried interfaces, using nondestructive tabletop extreme ultraviolet (EUV) coherent diffractive imaging (CDI). Copper na
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01673c9a9a8ece3d631139fef04fde88
https://doi.org/10.1021/acs.nanolett.6b01864
https://doi.org/10.1021/acs.nanolett.6b01864
Publikováno v:
Optics Express. 28:11051
Speckle correlation imaging offers the ability to see objects through diffusive materials and around corners. Imaging self-illuminating thermal objects in non-line-of-sight scenarios is of particular interest. Here, using bispectrum and phase retriev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ef5e3a2f0cedb92524cd2690fb25fd9
https://doi.org/10.1364/oe.388260
https://doi.org/10.1364/oe.388260