Search results
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Title
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A MODIFIED SELF-INTERFERENCE BASED INCOHERENT DIGITAL HOLOGRAPHIC RECORDING SYSTEM
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Author
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Mishra, Abhinav
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Date Created
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2019
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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A Fresnel-type self-interference based incoherent digital holographic system that can measure the intensity and direction of incoming light field is proposed. This system is composed primarily of a convex lens as an objective, a linear polarizer, ...
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Title
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A Novel Fluorescence Based Method of Assessing Subsurface Damage in Optical Materials
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Author
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Williams, Wesley
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Date Created
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2009
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Subjects--Topical
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Mechanical engineering, Materials science, Optics
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Description
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Lapping and polishing are loose abrasive finishing processes that have been used to achieve critical surface parameters in optical materials for centuries. These processes remove material from the surface through a variety of mechanical and chemic...
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Title
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DUAL PROJECTION FRINGE PROJECTION PROFILOMETRY
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Author
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Venkatesh, Bhanu teja
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Date Created
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2019
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Subjects--Topical
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Optics, Engineering, Three-dimensional modeling
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Description
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Fringe-pattern projection (FPP) techniques are widely used for surface-shape measurement in a wide range of applications like object and scene modeling, part inspection, and reverse engineering. This thesis presents a way to increase the accuracy ...
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Title
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Design for Metrology of Freeform Optics
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Author
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Venditti, Kristen
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Date Created
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2020
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Subjects--Topical
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Mechanical engineering, Optics, Engineering
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Description
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Freeform optics offer significant advantages over the conventional aspheric optics, but pose new challenges in metrology and manufacturing. The spatial frequencies of an optical surface that must be measured have changed due to the progression of ...
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Title
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FIBER BASED TOOLS FOR POLISHING OPTICAL MATERIALS
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Author
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Shahinian, Hossein
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Date Created
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2018
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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In this dissertation, the development of alternative fiber based polishing tools for the finishing of precision freeform and aspherical optics is introduced. Freeform and aspherical optics, i.e. optics with varying radius of curvatures (ROC), are ...
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Title
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Freeform Optical Surface Form Metrology with Serial Data Acquisition
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Author
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Noste, Todd
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Date Created
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2021
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Subjects--Topical
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Mechanical engineering, Optics, Physics
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Description
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Freeform optics, or optics with no axis of rotational invariance, provide optical designers more degrees of freedom, flexibility, and opportunity for innovation increasing optical performance and system integration while decreasing the form factor...
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Title
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Improved Fidelity of Triangulation Sensor Measurements in Optical Inspection
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Author
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Hosseinpour, Milad
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Date Created
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2022
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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With the evolution of gear design requirements for new applications, classical gear inspection based on a time-consuming line-oriented tactile measurement must be replaced with a more rapid, areal inspection that can capture complex modern gear mo...
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Title
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Integration of advanced manufacturing in the mechanical design of reflective optics
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Author
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Horvath, Nicholas
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Date Created
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2020
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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High-performance freeform optical systems, designed for broad spectral imaging fromthe visible to the far infrared, place new demands on optical design, precision manufacturing,and precision metrology. In this dissertation, four key aspects are ad...
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Title
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Manufacturing Methodologies and Optomechanics for Dynamic Freeform Optics
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Author
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Gurganus, Dustin
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Date Created
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2021
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Subjects--Topical
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Optics, Engineering, Mechanical engineering
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Description
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Freeform optics have traversed the gap from theoretical to practical application propelled by ultra-precision multi-axis machining, like diamond turning and milling. Utilized for complex infrared sensors to human vision correction, freeform optics...
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Title
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OPTICAL INSTRUMENTATION USING GEOMETRIC PHASE ELEMENTS
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Author
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Light, Alyson
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Date Created
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2020
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Subjects--Topical
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Mechanical engineering, Optics, Engineering
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Description
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Traditional optical instrumentation typically requires a controlled, stable environment, and this limits systems to a laboratory setting. For in-situ metrology applications and outdoor measurements, novel methods that are compact and stable are re...
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Title
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OPTICAL METROLOGY OF FREEFORM OPTICS UTILIZING INTERFEROMETRIC STITCHING
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Author
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Hovis, Clark
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Date Created
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2019
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Subjects--Topical
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Mechanical engineering, Optics, Engineering
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Description
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The utilization of interferometric stitching with coherence scanning interferometers has allowed these instruments to measure much larger areas than a single site measurement would permit. This has a major impact on the measurement of mid-spatials...
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Title
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Optical surface characterization with the structure function
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Author
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He, Liangyu
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Date Created
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2013
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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It is important to characterize surface and transmitted wavefront errors in terms of the spatial content. The errors are typically analyzed in three spatial domains: figure, ripple (or mid-spatial frequency) and roughness. These errors can affect ...
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Title
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POLYDYNE DISPLACEMENT INTERFEROMETER USING FREQUENCY-MODULATED LIGHT
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Author
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Arablu, Masoud
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Date Created
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2019
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Subjects--Topical
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Mechanical engineering, Electrical engineering, Optics
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Description
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A novel multi-frequency (polydyne) optical interferometry method is introduced and a prototype developed to evaluate its performance in a Michelson displacement interferometer configuration. The polydyne interferometer contains three main parts of...
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Title
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Ultraprecision Diamond Machining of Polycarbonate Complex Multi-Sided Freeform Optics
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Author
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Swagler, Steven
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Date Created
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2022
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Subjects--Topical
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Optics, Mechanical engineering
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Description
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Advances in technology are driving optical systems to become more and more complex and compact. Ultra-precision machining centers have advanced to catch up with optical designs but there is a defined set of methods defining the use of the machines...
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Title
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Variable Shearing Holography
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Author
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Shanmugam, Prithiviraj
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Date Created
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2023
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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From the perspective of manufacturing, it is not always ideal to use conventional methods of surface and optical metrology. Many optical metrology systems like interferometry use a stable temperature-controlled environment in a laboratory setting ...
