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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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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Cutting Mechanics and Manufacture of Optics for Imaging Applications
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Author
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Troutman, John
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Date Created
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2016
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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Ultraprecision diamond machining enables physical realization of freeform surfaces of nearly arbitrary complexity through turning and milling processes. Achievable form accuracies make diamond machining a viable alternative to conventional techniq...
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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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Displacement Scale Based on Speckles
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Author
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Farsad, Mahsa
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Date Created
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2015
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Subjects--Topical
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Mechanical engineering, Optics
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Description
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Speckle patterns are complex intensity distributions, which occur when an optically rough surface is illuminated with a coherent light. The speckle phenomenon was known to be troublesome when the laser was first introduced, but later it was discov...
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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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In Situ Fringe Projection Profilometry for Laser Powder Bed Fusion Process
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Author
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Zhang, Bin
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Date Created
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2017
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Subjects--Topical
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Mechanical engineering, Optics, Engineering
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Description
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Additive manufacturing (AM) offers an industrial solution to produce parts with complex geometries and internal structures that conventional manufacturing techniques cannot produce. However, current metal additive process, particularly the laser p...
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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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Minimizing Task-Specific Uncertainty in CMM-Based Freeform Optics Metrology
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Author
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Uwakwe, Michael
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Date Created
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2018
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Subjects--Topical
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Mechanical engineering, Optics, Metrology
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Description
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Measurements of surface form involve a comparison between the form of the test surface and a reference. In coordinate measuring machine (CMM) measurements, this reference is the machine geometry. The measurement results typically show a height map...
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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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PERFORMANCE AND SPECIFICATION OF OPTICAL COMPONENTS WITH MID-SPATIAL FREQUENCY SURFACE ERRORS
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Author
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Aryan, Hamidreza
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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 advent of sub-aperture computer-numerically controlled (CNC) manufacturing techniques has enabled new opportunities for high-performance optical components and systems. Freeform and other challenging designs are now possible like never before....
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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...
