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Search Publications by: Douglas A. Olson (Ctr)

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Displaying 26 - 50 of 82

Metrology for comparison of displacements at the picometer level

July 31, 2014
Author(s)
Jack A. Stone Jr., Patrick F. Egan, Jay H. Hendricks, Gregory F. Strouse, Douglas A. Olson, Jacob E. Ricker, Gregory E. Scace, Donavon Gerty
An apparatus capable of comparing displacements with picometer accuracy is currently being designed at NIST. In principle, we wish to compare one displacement in vacuum to a second, equal displacement in gas, in order to determine gas refractive index. If

Picometer Metrology for Precise Measurement of Refractive Index, Pressure, and Temperature

December 18, 2013
Author(s)
Jack A. Stone Jr., Patrick F. Egan, Donavon Gerty, Jay H. Hendricks, Douglas A. Olson, Jacob E. Ricker, Gregory E. Scace, Gregory F. Strouse
Fabry-Perot interferometers can be used for very precise measurement of the refractive index of gasses. This can enable increased accuracy of interferometer-based length measurement. In addition, because the refractive index of a gas depends on its

Picometer metrology for precise measurement of refractive index, pressure, and temperature

July 14, 2013
Author(s)
Jack A. Stone Jr., Patrick F. Egan, Jay H. Hendricks, Gregory F. Strouse, Douglas A. Olson, Jacob E. Ricker, Gregory E. Scace
For several years we have been studying the use of Fabry-Perot interferometers for precise measurement of the refractive index of gasses, where the primary motivation has been to improve interferometer-based length measurement. Because the refractive index

Faster, Better, Cheaper: New Automated Vacuum Calibration Service at NIST

October 1, 2012
Author(s)
Jacob E. Ricker, Jay H. Hendricks, Douglas A. Olson, Gregory F. Strouse
In today’s fast-paced world and ever expanding quality assurance requirements, the National Institute of Standards and Technology (NIST) has developed a system to fill the need for faster, better, and cheaper low pressure calibrations (0.65 Pa to 130 kPa)

A gas pressure scale based on primary standard piston gauges

December 6, 2010
Author(s)
Douglas A. Olson, Robert G. Driver, Walter J. Bowers Jr.
The National Institute of Standards and Technology has redefined its gas pressure scale, up to 17 MPa, based on two primary standard piston gauges. The primary standard piston gauges are 35.8 mm in diameter and operate from 20 kPa to 1 MPa. Ten secondary