Journal ArticleDOI
Phase-error correction in digital holography
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TLDR
Computer simulations used to compare the performance of digital shearing laser interferometry and various sharpness metrics for the correction of phase errors when imaging a diffuse object found phase errors better than lambda/50 root-mean-square (RMS).Abstract:
The quality of images computed from digital holograms or heterodyne array imaging is degraded by phase errors in the object and/or reference beams at the time of measurement. This paper describes computer simulations used to compare the performance of digital shearing laser interferometry and various sharpness metrics for the correction of such phase errors when imaging a diffuse object. These algorithms are intended for scenarios in which multiple holograms can be recorded with independent object speckle realizations and a static phase error. Algorithm performance is explored as a function of the number of available speckle realizations and signal-to-noise ratio (SNR). The performance of various sharpness metrics is examined in detail and is shown to vary widely. Under ideal conditions with >15 speckle realizations and high SNR, phase corrections better than λ/50 root-mean-square (RMS) were obtained. Corrections better than λ/10 RMS were obtained in the high SNR regime with as few as two speckle realizations and at object beam signal levels as low as 2.5 photons/speckle with six speckle realizations.read more
Citations
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Journal ArticleDOI
Computational adaptive optics for broadband optical interferometric tomography of biological tissue
TL;DR: A method to correct aberrations in a tomogram rather than the beam of a broadband optical interferometry system based on Fourier optics principles, which enables object reconstruction (within the single scattering limit) with ideal focal-plane resolution at all depths.
Journal ArticleDOI
High-resolution, wide-field object reconstruction with synthetic aperture Fourier holographic optical microscopy
TL;DR: Synthetic-aperture Fourier holographic microscopy is utilized to resolve micrometer-scale microstructure over millimeter-scale fields of view to 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.
Journal ArticleDOI
Aberration-free volumetric high-speed imaging of in vivo retina
Dierck Hillmann,Hendrik Spahr,Carola Hain,Helge Sudkamp,Gesa Franke,Clara Pfäffle,Christian Winter,Gereon Hüttmann +7 more
TL;DR: It is shown that a simple interferometric setup–based on parallelized optical coherence tomography–acquires volumetric data with 10 billion voxels per second, exceeding previous imaging speeds by an order of magnitude.
Journal ArticleDOI
High-resolution synthetic-aperture digital holography with digital phase and pupil correction.
TL;DR: A 218 mega-pixel synthetic aperture was collected by raster scanning a CCD detector in a digital holography imaging experiment using a two-step cross-correlation registration to achieve diffraction-limited resolution.
Journal ArticleDOI
Subaperture correlation based digital adaptive optics for full field optical coherence tomography
TL;DR: A sub-aperture correlation based numerical phase correction method for interferometric full field imaging systems provided the complex object field information can be extracted without the need of any adaptive optics, spatial light modulators (SLM) and additional cameras.
References
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Journal ArticleDOI
Introduction to Fourier Optics
Joseph W. Goodman,Mary E. Cox +1 more
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Book
Introduction to Fourier optics
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Journal ArticleDOI
Reconstructed Wavefronts and Communication Theory
Emmett N. Leith,Juris Upatnieks +1 more
TL;DR: In this paper, a two-step imaging process is described from a communication-theory viewpoint, which consists of three well-known operations: a modulation, a frequency dispersion, and a square-law detection.
Journal ArticleDOI
Optical Resolution Through a Randomly Inhomogeneous Medium for Very Long and Very Short Exposures
TL;DR: In this article, the average resolution of very-long and very-short-exposure images is studied in terms of the phase and log-amplitude structure functions, whose sum is called the wave-structure function.
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