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 7 of 7 for “"Diffractive optical element"”.
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Performance and Analysis of a Deployable Diffractive Optical Element for Small Satellite Missions
… lighter, and more deployable instrumentation, diffractive optical elements (DOEs) offer a compelling alternative to traditional optics. Their ability to focus light through engineered phase profiles rather than curved surfaces allows for large-aperture, flat optics that are far lighter and …
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All-Optically Addressed Spatial Light Modulator and Diffractive Optical Element Based on Photoalignment of Azobenzene Polymer
… (3D) displays hinges on the development of diffractive optical engines with high information bandwidth. However, conventional optical engines such as liquid crystal on silicon (LCOS) spatial light modulators (SLMs) and optically addressed SLMs (OASLMs) face scalability limitations in …
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Overcoming the far-field diffraction limit via absorbance modulation
… which greatly limits the capability of optical techniques. The proposed technique with absorbance modulation aims to get around the diffraction limit by using wavelength-selective chemistry to confine light to nanoscale dimension. Absorbance modulation lithography and imaging is a …
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Transverse mode selection and brightness enhancement in laser resonators by means of volume Bragg gratings
… possible solution, the angular selectivity of a diffractive optical element is proposed as a spatial filter, allowing for the design of compact high brightness sources not possible with conventional methods of transverse mode selection. This thesis explores the angular selectivity of volume Bragg …
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Techniques for high-speed high-resolution in-vivo volumetric fluorescence imaging
Optical microscopy has long been a cornerstone for exploring biological and biomedical systems. 3D microscopy with high spatialtemporal resolution over large fields of view is increasingly essential in life sciences. This thesis proposes two innovations to address this need: (1) high-resolution …
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Flexible Fabrication of Multi-scale Integrated 3D Periodic Nanostructures with Phase Mask
… challenge. This thesis study advances diffractive optical element (DOE) based 3D laser holographic nanofabrication of 3D periodic nanostructures and develops new kinds of DOEs for advanced diffracted-beam control during the fabrication. Phase masks, as one particular kind of DOE, are a …