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Author: Jack Stone Jr

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1. Metrology for comparison of displacements at the picometer level
Published: 7/31/2014
Authors: Jack A Stone Jr, Patrick F Egan, Jay H Hendricks, Gregory F Strouse, Douglas A Olson, Jacob E Ricker, Gregory E Scace, Donavon Gerty
Abstract: 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 inde ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914470

2. Picometer Metrology for Precise Measurement of Refractive Index, Pressure, and Temperature
Published: 12/18/2013
Authors: Jack A Stone Jr, Patrick F Egan, Donavon Gerty, Jay H Hendricks, Douglas A Olson, Jacob E Ricker, Gregory E Scace, Gregory F Strouse
Abstract: 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914549

3. Picometer metrology for precise measurement of refractive index, pressure, and temperature
Published: 7/14/2013
Authors: Jack A Stone Jr, Patrick F Egan, Jay H Hendricks, Gregory F Strouse, Douglas A Olson, Jacob E Ricker, Gregory E Scace
Abstract: 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 refractiv ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913914

4. Weak value thermostat with 0.2 mK precision
Published: 12/1/2012
Authors: Patrick F Egan, Jack A Stone Jr
Abstract: A new laser-based thermostat sensitive to 0.2 mK at room temperature is reported. The method utilizes a fluid-filled prism and interferometric weak value amplification to sense nanoradian deviations of a laser beam: due to the high thermooptic coef ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912232

5. Performing three dimensional measurements on micro-scale features using a flexible CMM fiber probe with ellipsoidal tip
Published: 1/5/2012
Authors: Balasubramanian Muralikrishnan, Jack A Stone Jr, Craig M Shakarji, John Richard Stoup
Abstract: The tip of a traditional CMM probe used for measurements of macro-scale artifacts is generally a sphere of excellent geometry. Its known diameter (from a prior calibration) and form along with the known approach direction (which is normal to the surf ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909420

6. Absolute refractometry of dry gas to {+ or -}3 parts in 10^u9^
Published: 6/20/2011
Authors: Patrick F Egan, Jack A Stone Jr
Abstract: We present a method of measuring the refractive index of dry gases absolutely at 632.8 nm wavelength using a Fabry-Perot cavity with an expanded uncertainty of < 3 {multiply} 10^u-9^ (coverage factor {I}k{/I} = 2. The main contribution to this uncer ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907731

7. Geometric effects when measuring small holes with micro contact probes.
Published: 3/1/2011
Authors: Jack A Stone Jr, Balasubramanian Muralikrishnan, Chittaranjan Sahay
Abstract: A coordinate measuring machine with a suitably small probe can be used to measure micro-features such as the diameter and form of small holes (often about 100 micrometers in diameter). When measuring small holes, the clearance between the probe tip a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903665

8. Temperature Stabilization System with Millikelvin Gradients for Air Refractometry Measurements Below the 10^-8 Level
Published: 3/1/2011
Authors: Patrick F Egan, Jack A Stone Jr
Abstract: Refractometry of air is a central problem for interferometer-based dimensional measurements. Refractometry at the 10−9 level is only valid if air temperature gradients are controlled at the millikelvin (mK) level. Very precise tests of secondge ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907214

9. An Optical Frequency Comb Tied to GPS for Laser Frequency/Wavelength Calibration
Published: 11/1/2010
Authors: Jack A Stone Jr, Patrick F Egan
Abstract: Optical frequency combs can be employed over a broad spectral range to calibrate laser frequency or vacuum wavelength. This article describes procedures and techniques utilized in the Precision Engineering Division of NIST (National Institute of Sta ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904835

10. Micro-feature dimensional and form measurements with the NIST fiber probe on a CMM
Published: 7/30/2010
Authors: Balasubramanian Muralikrishnan, Jack A Stone Jr, John Richard Stoup, Chittaranjan Sahay
Abstract: The NIST fiber probe is a Coordinate Measuring Machine (CMM) probing system intended for diameter and form measurement of micro features and small holes. This Moore M48 CMM at NIST can measure holes down to 500 um diameter with the Movamatic probe; t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903944



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