Search results
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Title
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A COMPUTATIONAL SPECTRAL IMAGING TECHNIQUE AND ITS APPLICATION IN FORM METROLOGY
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Author
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Habibi, Nasim
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Date Created
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2017
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Subjects--Topical
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Optics
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Description
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Many existing systems for three-dimensional (3D) shape measurement require mechanical moving parts that limit the measurement speed. A non-contact optical system that does not requires any moving parts can, in principle, increase the speed of meas...
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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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A SINGLE-PIXEL HYPERSPECTRAL IMAGING SYSTEM FOR CANCER MARGIN DETECTION
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Author
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Peller, Joseph
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Date Created
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2018
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Subjects--Topical
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Optics, Physics
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Description
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We have developed a hyperspectral imaging (HSI) system based on a single pixel camera design to detect differences in tissue properties based on the optical reflectance and autofluorescence spectra of the tissue. The long-term goal of this project...
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Title
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A novel positional sensor for 3D vascular reconstruction
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Author
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Merritt, John
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Date Created
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2011
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Subjects--Topical
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Optics, Information technology
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Description
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Abstract Intravascular ultrasound (IVUS) is a device that is surgically inserted into a femoral artery, or vein, to aid in the diagnosis of cardiovascular disease. Correctly locating the IVUS tip facilitates accurate 3D vascular reconstruction. Re...
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Title
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ABSOLUTE DISTANCE (THICKNESS) METROLOGY USING WAVELENGTH SCANNING INTERFEROMETRY
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Author
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Suratkar, Amit
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Date Created
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2009
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Subjects--Topical
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Optics, Optical engineering, Metrology
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Description
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Wavelength scanning interferometry offers a new dimension in precision metrology by measuring the cavity length (thickness), the cavity length variation over the cavity area (flatness), and the optical homogeneity within a transparent cavity; with...
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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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An all optical approach for comprehensive in-operando analysis of radiative and nonradiative recombination processes in GaAs double heterostructures
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Author
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Zhang, Y. (Yong), 1960-, Zhang, Fan, Castaneda, Jose, Gfroerer, Timothy, Friedman, Daniel, Zhang, Yong-Hang, Wanlass, Mark W.
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Subjects--Topical
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Optics, Photoluminescence
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Description
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We demonstrate an all optical approach that can surprisingly offer the possibility of yielding much more information than one would expect, pertinent to the carrier recombination dynamics via both radiative and nonradiative processes when only one...
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Title
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CHARACTERIZATION OF LIGHT-META STRUCTURE INTERACTIONS
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Author
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Chandra, Nitish
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Date Created
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2018
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Subjects--Topical
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Optics, Physics
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Description
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The advent of metamaterials has increased the complexity of possible light-matter interactions, creating gaps in knowledge and violating various commonly used approximations and rendering some common mathematical frameworks incomplete. Our forward...
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Title
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COMPRESSIVE IMAGING AND DUAL MOIRÉ LASER INTERFEROMETER AS METROLOGY TOOLS
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Author
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Abolbashari, Mehrdad
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Date Created
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2013
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Subjects--Topical
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Optics, Engineering
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Description
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Metrology is the science of measurement and deals with measuring different physical aspects of objects. In this research the focus has been on two basic problems that metrologists encounter. The first problem is the trade-off between the range of ...
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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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Characterization of Broadband Optical Functionality of Freeform Optics
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Author
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Koerber, Jonathan
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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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Freeform optics, broadly described as optical elements with at least one surface lacking translational or rotational symmetry, have seen increased interest due to recent advances in optical design, fabrication, and measurement. Freeform optics pro...
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Title
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Complex photonic crystals for broadband "all-angle" self-collimation
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Author
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Chuang, Yi-Chen
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Date Created
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2010
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Subjects--Topical
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Optics
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Description
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Self-collimation is a dispersion property of many photonic crystals (PCs), in which light beam can propagate free of divergence in the PCs. While self-collimation is a desired property for applications related to wave guiding and light collection,...
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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 AND FABRICATION OF LOW LOSS AND LOW INDEX OPTICAL METAMATERIALS
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Author
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Cox, Princess
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Date Created
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2013
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Subjects--Topical
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Optics, Nanoscience
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Description
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The study of optics has changed over the past 3000 years. We have developed beyond the early lens technologies of quartz and other types of glass materials and new materials are being engineered to enhance the properties of naturally occurring mat...
