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 12 of 12 for “"micro optics"”.
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Micro optics for micro hybrid concentrator photovoltaics
… of the cells to the level of hundreds of microns and accordingly the concentrating optics, micro hybrid CPV overcomes the listed issues and also delivers a small form factor module prole similar to conventional at panel PV. In this thesis, we are focusing on the critical optical components …
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Additive Lithography Fabrication And Integration Of Micro Optics
… few methods exist for inexpensive fabrication of micro optical elements. In this work we present an innovative technique termed Additive Lithography that makes use of binary masks and controlled partial exposures to sculpt photoresist into the desired optical surface relief profile. We explore …
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Selective Mode Excitation In Specialty Waveguides Using Micro Optical
… with unique optical properties. Diffractive and micro optics are highly effective for selectively coupling light to specific modes. Using micro optics, mode selective coupling can be achieved through several matching schemes: phase only, phase and amplitude, or phase, amplitude and polarization. …
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Micro-scale processing of diamond structures and devices
… plasma. Based on these studies, various diamond micro-optics including diamond microspherical positive and negative lenses, micro-cylindrical and micro-ring lenses, complex micro-lenses and optical gratings were designed and successfully fabricated. Structural and optical characterisations …
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A New Hybrid Diffractive Photo-mask Technology
In the field of photolithography for micro-chip manufacturing, the photo-mask is used to print desired patterns on a proper photo-resist on wafer. The most common type of photo-mask is binary amplitude mask made an opaque layer of chrome. The principle and potential application of hybrid photo-mask …
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Creation of 3-dimensional micro-optical materials
… gaps, negative refractive index, transformation optics, and sub-diffraction limit focusing, to name a few. These phenomena have great implications for our ability to control light, whether it is in its spectral emission and absorption, in directional control through waveguides, or in its ability …
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Computational Optical Imaging Systems for Spectroscopy and Wide Field-of-View Gigapixel Photography
… spherical focal plane which is relayed by small micro-optics to discrete focal planes. Using this design methodology allows for gigapixel designs at low f/# that are only a few pounds and smaller than a one-foot hemisphere.</p><p>Computational imaging systems add the necessary step of forward …
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Design And Assessment Of Compact Optical Systems Towards Special Effects Imaging
… As part of the presented work, compact relay optics was assessed, developed, and a working prototype was built. It was concluded that even though compact relay optics can be achieved, further push for compactness and cost-effectiveness was impossible in the paradigm of bulk macro-optics …
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Auslegung, Simulation und Fertigung eines elektrostatisch betriebenen, selbstjustierenden, optischen 1x2 Multiplexers
Die Dissertation behandelt die Auslegung und Fertigung eines elektrostatisch betriebenen Faserschalters (Multiplexers). Schwerpunkt der Arbeit ist die detaillierte Betrachtung der Kopplung zwischen optischer, elektrischer und mechanischer Domäne. Abgeschlossen wird die Arbeit durch die …
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Design And Optimization Of Nano-optical Elements By Coupling Fabrication To Optical Behavior
… a set of numerical tools was developed to model micro and nano fabrication processes. They were combined with equally capable tools to model optical performance of the simulated structures. Using these tools, it was predicted and demonstrated that 3D nanostructures may be formed on a standard …
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Parametric Design, Modeling, and Optical Evaluation of Retroreflective Prismatic Structures
Retroreflectors (RR) are defined as passive optical structures that redirect incident light to its originating source. Specific types of retroreflectors called inverted cubes (ICs) function through total internal reflection (TIR) and are used in various applications such as measurement tools, …
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Non-lithographic and scalable manufacturing of silicon micro & nanomaterials
… systems, and light-weight composites. Novel micro/nanomanufacturing methods - such as 2D and 3D printing, imprinting, self-assembly, deterministic micro-assembly, flexography, and roll-to-roll systems - are among a growing set of new platforms that allow for integration of metals, polymers, …