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You searched on: Author: jack stone jr

Displaying records 11 to 20 of 54 records.
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11. 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 ...

12. 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 ...

13. Temperature stabilization system with millikelvin gradients for refractometry
Published: 7/25/2010
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 level. Very precise tests of second-generati ...

Published: 11/2/2009
Authors: Balasubramanian Muralikrishnan, Jack A Stone Jr., John Richard Stoup
Abstract: We discuss the measurement of diameter and form of micro-holes with reverse tapers in a fuel injector nozzle using an ultra-low force contact fiber probe on a CMM. The fiber probe was designed and built at the National Institute of Standards and Tech ...

15. Uncalibrated Helium-Neon Lasers in Length Metrology
Published: 9/1/2009
Author: Jack A Stone Jr.
Abstract: The vacuum wavelength of a gas laser cannot vary from its central value by more than a few parts in 10^6. Consequently, an uncertainty of this magnitude can be assigned for the wavelength of the laser even if it has not been calibrated and even if ...

16. Advice from the CCL on the use of unstabilized lasers as standards of wavelength: the helium-neon laser at 633 nm
Published: 1/1/2009
Authors: Jack A Stone Jr., Jennifer Decker, Patrick Gill, Andrew Lewis, Patrick Juncar, Daniele Rovera, Miguel Villiseid
Abstract: The Consultative Committee for Length has recommended that red (633 nm) unstabilized Helium-Neon lasers, operating on the 3s2¿_2p4 transition, should be included in the list of standard frequencies for realization of the meter. This article discusses ...

17. Using uncalibrated lasers as wavelength standards
Published: 10/1/2008
Author: Jack A Stone Jr.
Abstract: The fundamental atomic physics of a gas laser transition is such that the transition frequency, or equivalently, the vacuum wavelength of the laser, cannot vary from its central value by more than a few parts in 106. The uncertainty of the gas laser ...

18. Area Measurement of Knife Edge and Cylindrical Apertures using Ultra Low Force Contact Fiber Probe on a CMM
Published: 1/1/2008
Authors: Balasubramanian Muralikrishnan, Jack A Stone Jr., John Richard Stoup
Abstract: Several radiometric and photometric measurements depend on high accuracy area measurement of precision apertures. Some apertures have sharp edges and are generally measured optically. At the Precision Engineering Division (PED) of the National Instit ...

19. Calibrating Laser Vacuum Wavelength With a GPS-Based Optical Frequency Comb
Published: 5/15/2007
Authors: Jack A Stone Jr., Liang Lu, Patrick F Egan
Abstract: The Global Positioning System (GPS) can deliver an exceptionally accurate frequency standard to any point in the world. When we use the GPS signal to control an optical frequency comb, the comb+GPS system provides laser light with well-known frequenc ...

20. Roundness Measurements Using the NIST Fiber Probe
Published: 1/1/2007
Authors: Balasubramanian Muralikrishnan, Jack A Stone Jr., John Richard Stoup
Abstract: We have described a fiber probe for dimensional measurement of micro-holes in the 2004 and 2006 ASPE annual meetings. In this abstract, we describe the adaptation of this probe for measuring roundness of tiny holes and knife edge apertures. In its cu ...

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