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 “"Optical metrology"”.
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Optical metrology of thin films
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1997.
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Octave-spanning lasers for optical metrology applications
… mode comb. The system developed is suitable for optical metrology applications in general, although the version here presented is locked to the hydrogen 1S-2S transition frequency in ultracold hydrogen. A detailed study of the carrier-envelope phase dynamics and noise characteristics of …
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Compression and phase reconstruction of temporal fringe pattern data
Interferometry is an established method in optical metrology. Many analysis methods have been developed to retrieve the phase information from the interferometric fringe pattern. Temporal fringe patterns analysis is fast gaining prominence due to the increased usage of optical metrology techniques …
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A Novel Optical Fatigue Monitoring And Crack Sensing System
… These challenges represent opportunities for optical based strain measuring sensors.</p> <p>This work is focused on the optimization and assessment of a novel optical metrology application. Optical metrology is the technology and science pertaining to measurements with light. These …
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Interferometry-based Free Space Communication And Information Processing
… of opto-electronic information processing and optical communications. A number of optical systems using interferometric techniques both in the optical and the electronic domains has been demonstrated in the filed of signal transmission and processing, optical metrology, defense, and physical …
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On the feasibility of integrated optical waveguide-based in situ monitoring of microelectromechanical systems (MEMS)
… explores the feasibility of using integrated optical waveguides to measure the motion of microelectromechanical structures (MEMS). MEMS are a class of silicon devices which are being developed as sensors and actuators. Because these free moving structures are fabricated using processes similar …
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Laser speckle modeling for three-dimensional metrology and LADAR
… in the development process of three-dimensional optical-metrology imaging systems. These models were developed to aid in the proof of concept for various three-dimensional metrology techniques. These models were then compared to real-world imaging systems, developed by both the author and other …
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Spatial Fringe Analysis Methods and their Application to Holographic Interferometry and Fringe Projection Techniques
… a significant advancement in the field of optical metrology as it allows for the measurement of displacement, strain, and curvature of a deformed object and avoids the necessity of using filtering and unwrapping procedures, multiple analysis techniques, and multiple interferometric …
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Planar chalcogenide glass materials and devices
… include high-speed telecommunication, on-chip optical interconnect, imaging and photovoltaics. Another important area planar photonic technologies may penetrate into is biochemical sensing. High precision optical metrology tools can be applied to detect optical property changes associated with …
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Telescopes and Techniques for the High-Resolution Characterisation of Exoplanets
… of my research is in developing SUPER-SHARP, an optical alignment technology for use in future large aperture unfolding space telescopes. Such facilities and technologies are needed for conducting the high spatial resolution observations required for characterising Earth-like exoplanets. In this …
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High-quality 3D shape measurement with binarized dual phase-shifting method
… non-contact measurement technologies</p> <p>(optical metrology techniques). There are a variety of optical techniques developed till now.</p> <p>Some of the well-known technologies include laser scanners, stereo vision, and structured</p> <p>light systems. The main limitation of laser scanners …
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DEVELOPMENT OF PHASE RETRIEVAL TECHNIQUES IN DISPLACEMENT AND DISPLACEMENT DERIVATIVES MEASUREMENT
… derivatives measurement using coherent optical methods. A Teager-operator based algorithm called DHODA and a novel fringe orientation and density map based fringe analysis technique are proposed for phase derivatives determination. A derivative based simplified phase tracker model is …