Search results
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Title
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Absolute Surface Reconstruction by Slope Metrology and Photogrammetry
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Author
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Dong, Yue
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Date Created
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2014
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Subjects--Topical
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Optics
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Description
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Developing the manufacture of aspheric and freeform optical elements requires an advanced metrology method which is capable of inspecting these elements with arbitrary freeform surfaces. In this dissertation, a new surface measurement scheme is in...
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Title
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Areal gear metrology with modified flanks
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Author
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Ni, Kang
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Date Created
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2017
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Subjects--Topical
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Mechanical engineering
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Description
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Gears are critical mechanical components in power transmission systems, used across a board spectrum of industries such as automobile, aerospace and renewable energy. Given the advancement of design and manufacture of gears in the past decades, th...
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Title
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Augmented Reality With Digital Metrology For Assembly
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Author
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Nawab, Rahma
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Date Created
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2022
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Subjects--Topical
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Optics
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Description
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This dissertation aims to create and demonstrate a fast and inexpensive quantitative dimensional inspection system for industrial assembly line applications that can detect position errors of assembled components on a scale of 1 mm and larger. The...
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Title
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Calibrating slope-dependent errors in profilometry
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Author
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Zhou, Yue
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Date Created
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2014
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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Optical profilometers, such as scanning white light interferometers and confocal microscopes, provide high resolution measurements and are widely utilized in many fields for measuring surface topography. The techniques are capable of high-speed su...
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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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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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Knee Joint Biomechanics after Anterior Cruciate Ligament Reconstruction
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Author
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Wang, Hongsheng
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Date Created
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2012
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Subjects--Topical
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Mechanical engineering, Biomechanics, Biomedical engineering
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Description
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Anterior cruciate ligament (ACL) is an important stabilizer of the knee joint. After ACL rupture, the knee joint has difficulty maintaining its stability; thus the patient often has to receive an ACL-reconstructive surgery to regain the knee joint...
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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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Optically Projected Length Scale for Use in Photogrammetry
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Author
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Thewlis, Patrick
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Date Created
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2020
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Subjects--Topical
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Optics, Physics
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Description
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Photogrammetry is a measurement technique where 3D coordinate data and feature information can be extracted from 2D photographs or images. Length scale objects are calibrated artifacts placed into a photogrammetry scene which have precisely define...
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Title
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PLASMONIC NANOLITHOGRAPHY MACHINE (PLM)
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Author
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Saad, Mohamed
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Date Created
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2013
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Subjects--Topical
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Mechanical engineering
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Description
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The Plasmonic Nanolithography Machine (PLM) is a prototype that adopts near field maskless plasmonic nanolithography to achieve 45 nm line widths at 45 nm half pitch. A plasmonic lens floating on a hydrodynamic air bearing rides on a disc with abo...
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Title
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POSITIONING SENSOR BY COMBINING OPTICAL PROJECTION AND PHOTOGRAMMETRY
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Author
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Zheng, Benrui
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Date Created
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2014
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Subjects--Topical
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Optics, Engineering, Remote sensing
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Description
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Six spatial parameters, (x, y, z) for translation, and pitch, roll, and yaw for rotation, are used to describe the 3-dimensional position and orientation of a rigid body - the 6 degrees of freedom (DOF). The ability to measure these parameters is ...
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Title
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Performance Investigation of Rotary Tables in Large-scale Metrology
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Author
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Wang, Qichang
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Date Created
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2019
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Subjects--Topical
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Mechanical engineering
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Description
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Rotary tables significantly improve the flexibility and efficiency of multi-axis measuring devices and multi-axis machining centers by providing a quick positioning of workpieces. Large-scale rotary tables are designed and produced for increasing ...
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Title
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Sub-scale Machining of Large Components
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Author
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Anderson, Paul
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Date Created
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2015
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Subjects--Topical
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Mechanical engineering
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Description
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This research examines the feasibility of machining components with precise tolerances using machines smaller than the completed part. This can conceptually be achieved in two ways. 1.) move a part around a machine, machining a portion of the part...
