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Search Publications by: Theodore V. Vorburger (Assoc)

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Displaying 226 - 250 of 417

Measurements and Predictions of Light Scattering by Clear Coatings

May 1, 2001
Author(s)
M E. McKnight, Theodore V. Vorburger, Egon Marx, Maria E. Nadal, P Y. Barnes, Michael A. Galler
Comparisons are made between calculations and measured angle-resolved light scattering distributions from clear dielectric isotropic epoxy coatings over a range of rms roughness conditions, resulting in strongly specular scattering characteristics

Documentary and Physical Standards for Surface Finish and Imperfections

February 1, 2001
Author(s)
Theodore V. Vorburger
Surface finish and imperfections are important properties of optical surfaces because they are caused by manufacturing limitations or defects and are linked to degradation of optical performance. Surface finish or surface roughness constitutes the numerous

Atomic Level Surface Metrology

January 1, 2001
Author(s)
Theodore V. Vorburger, Ronald G. Dixson, Jun-Feng Song, Thomas Brian Renegar, Joseph Fu, Ndubuisi George Orji, V W. Tsai, E. C. Williams, H Edwards, D Cook, P West, R Nyffenegger
MotivationSemiconductor wafers and many types of optical elementsrequire ultra-smooth surfaces in order to functionas specifiedExamples:Laser gyro mirrors with rms roughness 0.1 nmSilicon gate oxides with thickness 3 nm,rms roughness must be significantly

Establishment of a Virtual / Physical Standard for Bullet Signature Measurements

January 1, 2001
Author(s)
Jun-Feng Song, Theodore V. Vorburger, M Ols
The National Integrated Ballistics Information Network (NIBIN) is currently under development by the Bureau of Alcohol, Tobacco and Firearms (ATF) and the Federal Bureau of Investigation (FBI). The National Institute of Standards and Technology (NIST) and

Establishment of a Virtual/Physical Standard for Bullet Signature Measurements

January 1, 2001
Author(s)
Jun-Feng Song, Theodore V. Vorburger, M Ols
The National Integrated Ballistics Information Network (NIBIN) is currently under development by the Bureau of Alcohol, Tobacco and Firearms (ATF) and the Federal Bureau of Investigation (FBI). The National Institute of Standards and TEchnology (NIST) and

Establishment of Measurement Traceability for NIST Standard Bullets and Casings

January 1, 2001
Author(s)
Jun-Feng Song, Theodore V. Vorburger, M Ols
The National Integrated Ballistics Information Network (NIBIN) is currently under development by the Bureau of Alcohol, Tobacco and Firearms (ATF) and the Federal Bureau of Investigation (FBI). The NIST Standard Bullets and Casings Project aims to provide

Modeling, Simulation and Prediction of Rockwell Hardness Indentation

January 1, 2001
Author(s)
Li Ma, J Zhou, Theodore V. Vorburger, R Dewit, Richard J. Fields, Samuel Low, Jun-Feng Song
Rockwell hardness test, as a measure of the resistance of a material to localized plastic deformation, is a valuable and widely used mechanical test. However, the accuracy of Rockwell hardness measurement is still in question. The indenter, including both

Strengths and Limitations of Surface Texture Characterization Techniques

January 1, 2001
Author(s)
Theodore V. Vorburger
Surface finish is important to the function of a wide range of industrial components including highways, ship hulls and propellers, mechanical parts, semiconductors, and optics. Hence, many documentary standards have been developed for specifying surface

Development of NIST Standard Bullets and Casings Status Report

November 1, 2000
Author(s)
Jun-Feng Song, Theodore V. Vorburger, Alim A. Fatah
In April 1998, two prototype standard bullets were developed at the National Institute of Standards and Technology (NIST). In October 1999, prototype standard casings were also developed at NIST. The standard bullets and casings are intended for use in
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