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Browsing by Author "Rosen, Joseph"

Now showing 1 - 3 of 3
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    Digital Holography and 3-D Imaging: feature introduction
    Poon, Ting-Chung; Lee, B.; Yoshikawa, H.; Rosen, Joseph (Optical Society of America, 2009-12-01)
    This feature issue includes a representative selection of topics that were presented at the Digital Holography and 3-D Imaging Topical Meeting held in Vancouver, British Columbia, Canada, April 2009. (C) 2009 Optical Society of America
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    Homodyne scanning holography
    Rosen, Joseph; Indebetouw, Guy J.; Brooker, Gary (Optical Society of America, 2006)
    We have developed a modified version of a scanning holography microscope in which the Fresnel Zone Plates (FZP) are created by a homodyne rather than a heterodyne interferometer. Therefore, during the scanning the projected pattern on the specimen is frozen rather than varied as previously. In each scanning period the system produces an on-axis Fresnel hologram. The twin image problem is solved by a linear combination of at least three holograms taken with three FZPs with different phase values. (c) 2006 Optical Society of America.
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    Scanning holographic microscopy with resolution exceeding the Rayleigh limit of the objective by superposition of off-axis holograms
    Indebetouw, Guy J.; Tada, Yoshitaka; Rosen, Joseph; Brooker, Gary (Optical Society of America, 2007-02)
    We present what we believe to be a new application of scanning holographic microscopy to superresolution. Spatial resolution exceeding the Rayleigh limit of the objective is obtained by digital coherent addition of the reconstructions of several off-axis Fresnel holograms. Superresolution by holographic superposition and synthetic aperture has a long history, which is briefly reviewed. The method is demonstrated experimentally by combining three off-axis holograms of fluorescent beads showing a transverse resolution gain of nearly a factor of 2.