Open AccessHigh-resolution, wide-field object reconstruction with synthetic aperture Fourier holographic optical microscopy
Author(s) -
Timothy R. Hillman,
Thomas Gutzler,
Sergey Alexandrov,
David D. Sampson
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.007873
Subject(s) - holography , optics , fourier transform , lens (geology) , digital holographic microscopy , microscopy , numerical aperture , microscope , materials science , aperture (computer memory) , resolution (logic) , digital holography , depth of field , synthetic aperture radar , physics , computer science , computer vision , artificial intelligence , wavelength , quantum mechanics , acoustics
We utilize synthetic-aperture Fourier holographic microscopy to resolve micrometer-scale microstructure over millimeter-scale fields of view. Multiple holograms are recorded, each registering a different, limited region of the sample object's Fourier spectrum. They are "stitched together" to generate the synthetic aperture. A low-numerical-aperture (NA) objective lens provides the wide field of view, and the additional advantages of a long working distance, no immersion fluids, and an inexpensive, simple optical system. Following the first theoretical treatment of the technique, we present images of a microchip target derived from an annular synthetic aperture (NA = 0.61) whose area is 15 times that due to a single hologram (NA = 0.13); they exhibit a corresponding qualitative improvement. We demonstrate that a high-quality reconstruction may be obtained from a limited sub-region of Fourier space, if the object's structural information is concentrated there.