Search results | J. Murrey Atkins Library

Title: FUNDAMENTALS OF MATERIAL REMOVAL IN SILICON CARBIDE FOR FREEFORM OPTICS
Author: Shanmugam, Prithiviraj
Date Created: 2019
Subjects--Topical: Mechanical engineering
Description: The mechanical and thermal properties offered by Silicon carbide (SiC) make it an ideal material for reflective freeform optics. However, the hardness, brittleness and fracture toughness of the material pose a challenge to manufacturing. The manuf...

Title: PERFORMANCE AND SPECIFICATION OF OPTICAL COMPONENTS WITH MID-SPATIAL FREQUENCY SURFACE ERRORS
Author: Aryan, Hamidreza
Date Created: 2019
Subjects--Topical: Mechanical engineering, Optics, Engineering
Description: 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....

Title: REPLICATION OF FREEFORM OPTICS ONTO NEAR-NET-SHAPE SUBSTRATES USING DIAMOND TURNED STAMPERS
Author: Smith, Glen
Date Created: 2019
Subjects--Topical: Mechanical engineering
Description: Freeform optics open a new design space for optical systems. Production of freeform optics, with no axis of rotational symmetry, often requires the use of multi-axis (>2) sub aperture machining and finishing techniques. These are expensive and imp...

Title: Controlling force and displacement: Instrumentation design and application in thermal actuation and nanoindentation
Author: Fan, Chunjie
Date Created: 2021
Subjects--Topical: Mechanical engineering
Description: The motivation of this research is to build systems that precisely control displacement in the presence of external load (both linear and rotation force). To achieve this, two experimental platforms have been created. Those instruments incorporate...

Title: From Nonradiating Sources to Directionally Invisible Objects
Author: Hurwitz, Elisa
Date Created: 2017
Subjects--Topical: Optics, Physics
Description: The goal of this dissertation is to extend the understanding of invisible objects, in particular nonradiating sources and directional nonscattering scatterers. First, variations of null-field nonradiating sources are derived from Maxwell's equatio...

Title: Manufacturing Methodologies and Optomechanics for Dynamic Freeform Optics
Author: Gurganus, Dustin
Date Created: 2021
Subjects--Topical: Optics, Engineering, Mechanical engineering
Description: 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...

Title: Manufacture of Infrared Optics in Brittle Materials
Author: Owen, Joseph
Date Created: 2015
Subjects--Topical: Mechanical engineering
Description: Infrared optics are manufactured for many different applications including: thermal imaging, surveillance, night vision, medical, laser machining, laser surgery, etc. Most infrared transparent materials are hard, brittle, or both. Unless special c...

Title: MID-SPATIAL FREQUENCY CHARACTERIZATION AND SPECIFICATION FOR FREEFORM SURFACES USING ZERNIKE POLYNOMIALS
Author: Hosseinimakarem, Zahra
Date Created: 2017
Subjects--Topical: Optics, Engineering
Description: Mid-spatial frequency on freeform optical elements induces small-angle scatter and affects the optical performance. Fabrication techniques involved in making freeform surfaces leave tooling marks on the surface due to the sub-aperture nature of th...

Title: Cutting Mechanics and Manufacture of Optics for Imaging Applications
Author: Troutman, John
Date Created: 2016
Subjects--Topical: Mechanical engineering, Optics
Description: 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...

Title: Experimental and computational evaluation of a vibratory finishing process
Author: Navare, Jayesh
Date Created: 2017
Subjects--Topical: Mechanical engineering
Description: Vibratory finishing is among the widely recognized mass finishing techniques which is used for cleaning, deburring, edge rounding, polishing, and creating an isotropic surface finish on metal parts that have undergone previous machining operations...

Title: FREEFORM MEASUREMENT WITH STITCHING TALBOT INTERFEROMETER
Author: Furukawa, Yasunori
Date Created: 2018
Subjects--Topical: Optics
Description: Freeform optics are being used in many fields to realize the outstanding performance due to their high degree of freedom. To realize sufficiently high performance, it is necessary to manufacture the freeform surface with high accuracy, which requi...

Title: Characterization of Geometric Surface Features Using Statistically Based Analytical Tools
Author: Azimi, Farzad
Date Created: 2019
Subjects--Topical: Mechanical engineering
Description: The nature and quality of a surface’s topography can play an important role in a part’s performance and expected longevity. The complexity of a surface topography means that while commonly used ISO 25178-2 height based statistical metrics are capa...

Title: OPTICAL PERFORMANCE OF RANDOM ANTIREFLECTION STRUCTURED SURFACES ON OPTICAL FLATS AND DIFFRACTIVE COMPONENTS
Author: KUNALA, KARTEEK
Date Created: 2018
Subjects--Topical: Optics
Description: Random anti-reflection surface structures (rARSS) are non-periodic, densely packed, sub-wavelength structures, fabricated on an optical surface. Light incident to such a boundary propagates from superstrate to substrate through a gradient effectiv...

Title: OPTICAL DISPLACEMENT MEASUREMENT BY IMAGE CORRELATION
Author: Lambert, Nathan
Date Created: 2019
Subjects--Topical: Mechanical engineering
Description: This thesis describes the design and veriﬁcation of a scanning, optical, displacement measurement instrument, which utilizes digital image correlation (DIC) to measure displacement. This system is intended to provide proof of concept for a techniq...

Title: NONPROPAGATING EXCITATIONS IN 2-D
Author: Abney, Ray
Date Created: 2020
Subjects--Topical: Physics
Description: Nonpropagating excitations have been studied in 1-D and in 3-D, but not so much in 2-D. So, this thesis concerns 2-D nonpropagating excitations. In particular, we construct nonpropagating excitations confined to an annulus under a time-independent...

Title: Optical Vortices and Coherence in Nano-optics
Author: Smith, Matt
Date Created: 2019
Subjects--Topical: Optics, Nanoscience, Nanotechnology
Description: In this dissertation, we use theory and computation to conduct three projects in the area of nano-optics. In the first project, we study optical coherence conversion using a plasmonic hole array. This work led to the discovery of the optical coher...

Title: Surface Integrity in Diamond Machining Germanium For Infrared Optics
Author: Sizemore, Nicholas
Date Created: 2020
Subjects--Topical: Mechanical engineering
Description: Ultra-precision manufacturing is a deterministic method of producing optical-grade components. Continuous and interrupted machining operations are the main focus of this research with the goal of improving the manufacturing community’s knowledge. ...

Title: STRUCTURED OPTICAL MATERIALS FABRICATED USING TWO-PHOTON POLYMERIZATION
Author: Li, Yanzeng
Date Created: 2020
Subjects--Topical: Materials science, Optics, Physics
Description: Artificially structured materials, which are treated as macroscopically homogeneous media, exhibit effective optical properties that can be altered by engineering the materials' intrinsic geometries at a scale much smaller than the probing electro...

Title: Ultraprecision Diamond Machining of Polycarbonate Complex Multi-Sided Freeform Optics
Author: Swagler, Steven
Date Created: 2022
Subjects--Topical: Optics, Mechanical engineering
Description: 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...

Title: Space Variant Guided Mode Resonant Filters
Author: Roth, Zachary
Date Created: 2012
Subjects--Topical: Optics, Engineering, Nanoscience
Description: Guided mode resonance filters (GMRF) combine subwavelength gratings and planar slab waveguides to create highly efficient, narrow linewidth spectral filters. Resonances between diffracted orders of the SWG and the waveguide provide the mechanism f...