Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 87 for “"Hologram"”.
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Digital Hologram Image Processing
… we have made to the field of digital hologram image processing. In particular, we will deal with the processing of numerical reconstructions of real-world three-dimensional macroscopic objects recorded by in-line digital holography. Our selection of in-line digital holography over …
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Nonvolatile hologram storage in BaTiO₃
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Digital hologram recording systems: some performance improvements
… is capable of recording high-quality digital holograms of a real world 3D object. The object can be rotated on a rotational stage and a full 360� range of perspectives can be recorded. Speckle reduction using moving di�users can be performed to improve the image quality of the reconstructed …
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GPU-based digital hologram reconstruction and particle detection
Digital holograms, when combined with tracer particles, can be used for examining otherwise-invisible fluid flows. These holograms can be captured with standard digital imaging equipment, however processing them to extract tracer or particle locations is computationally expensive. Exacerbating the …
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Diffraction and exposure characteristics of the edgelit hologram
Thesis (M.S.)--Massachusetts Institute of Technology, Program in Media Arts & Sciences, 1995.
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Design and simulation of three-dimensional hologram emitting phased arrays in the near field
… a phased array that will emit three-dimensional holograms and investigate the scalability of the phased arrays. This thesis will cover the design and functionality of optical phased arrays and how they have been previously used to emit patterns in the far field. It will then explore …
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The Hologram and its Antecedents 1891–1965: The Illusory History of a Three–Dimensional Illusion
… as the antecedent of the three-dimensional hologram. However, Dennis Gabor (1900-1979) in his original publications on the hologram of 1948 and 1949 did not cite Lippmann’s work. This thesis explores how the hologram that featured in Gabor’s original theory, as an imaging technique to …
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Recrafting the hologram: A practice-based investigation into the feminisation and democratisation of holography through a glass-maker’s lens.
… methods of the production and recording of holograms, challenging the tried and tested method of production. These plates are then used in conjunction with handmade glass to create novel objects. This development of a unique creative practice has informed the design of a transportable …
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High-resolution Optical Scanning Holography
… volume of a biological specimen in the form of a hologram. With the data captured, a digital reconstruction or decoding is used to reconstruct the hologram of that such specimen. An accurate reconstruction of the recorded data provides with an in-depth analysis in the area where random noise and …
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Learning Disentangled Representations of Holograms via Deep Generative Model
… learning to develop real-time, super-resolution hologram generation. It first gives an overview of both the technologies of deep learning and holographic 3D displays. It demonstrates the strength of learning models and also identifies the challenges and limitations of conventional hologram …
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Edgelit holography : extending size and color
… the size and color capabilities of the edgelit hologram. Primary emphasis lies in the application of the edgelit hologram for image display purposes. However, the techniques developed here are applicable to other holographic recording techniques which utilize a steep-angled reference beam. The …
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Adaptive Aberration Correction for Holographic Projectors
… was the first to provide high-quality real-time hologram generation using general-purpose hardware while Freeman designed a method to correct arbitrary aberrations. As ingenious as the method was, the calculations were extensively lengthy. Addressing this issue, a variant of OSPR suited for …
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Double resolution microwave holography
… simple technique for the recording of microwave holograms using common hardware components, which offers the possibility of significant improvements in image resolution. Practical experiment has determined that, under ideal conditions, the resolution performance of this system approaches very …
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Propagation Effect In Inhomogeneous Media, Including Media With Light-induced And Fixed Gratings
… are suggested and analyzed. A transmission hologram based on the analogy with Stimulated Raman Adiabatic Passage (STIRAP) in nonlinear optics is proposed. This transmission hologram demonstrates high diffraction efficiency and low sensitivity to polarization and hologram strength. The other …
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Imaging using volume holograms
Volume holograms can be thought of as self-aligned 3D stacks of diffractive elements that operate coherently on incident fields as they propagate through the structure. In this thesis, we propose, design and implement imaging systems that incorporate a volume hologram as one of the elements that …
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Digital holographic imaging of aquatic species
… The DHI system operates by recording the hologram produced by the interference between a reference wave and the wave scatter by a coherently illuminated object with a charge-couple-device (CCD). The recorded hologram contains information about the amplitude and phase of the optical field …
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Reconstruction Enhancements with Optical Scanning Holography
… specimen in the form of a two-dimensional (2-D) hologram. Reconstruction of the original volume can be accomplished by applying digital reconstruction or decoding techniques to the recorded hologram. Accurate reconstruction of the 3-D volume and more specifically, the individual 2-D optical …
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Creating a three dimensional holographic movie
… to create a three-dimensional holographic movie. Holograms were written on VRP-M emulsion film with the green line of an Argon-Ion laser. The type of hologram write setup favored was a reflection hologram, due to its artistic capabilities. The illusion of a floating image is much better produced …
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