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You searched on: Author: john stoup Sorted by: title

Displaying records 1 to 10 of 32 records.
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1. A Fiber Probe for CMM Measurements of Small Features
Published: 8/1/2005
Authors: Jack A Stone Jr., Balasubramanian Muralikrishnan, John Richard Stoup
Abstract: We report on performance of a new form of fiber probe, which can be used in conjunction with a coordinate measuring machine (CMM) for microfeature measurement.  The probe stylus is a glass fiber with a small ball (?75 ?m diameter) glued to the e ...

2. A High Accuracy Micrometer for Diameter Measurements of Cylindrical Standards
Published: 1/1/1994
Authors: John Richard Stoup, Theodore D Doiron
Abstract: NIST has developed a new instrument to measure cylindrical standards including thread wires and plain plug gages. The instrument uses a laser interferometer system which is coupled with an air bearing linear motion slide and precise contact geometry ...

3. Accuracy and Versatility of the NIST M48 Coordinate Measuring Machine
Published: 10/1/2001
Authors: John Richard Stoup, Theodore D Doiron
Abstract: The NIST Is continuing to develop the ability to perform accurate, traceable measurements on a wide range of artifacts using a very precise, error-mapped coordinate measuring machine (CMM). The NIST M48 CMM has promised accuracy and versatility for m ...

4. 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 ...

5. CCM Key Comparison in the Pressure Range 0.05 MPa to 1 MPa (Gas Medium, Gauge Mode) - Phase A1: Dimensional Measurements and Calculation of Effective Area
Published: Date unknown
Authors: G F Molinar, B Rebaglia, A Sacconi, J C Legras, G P Vailleau, James W Schmidt, John Richard Stoup, D R Flack, W Sabuga, O Jusko
Abstract: The results obtained by five laboratories in the determination of the effective areas of two gas-operated 10 cm^u2^ piston-cylinder assemblies from dimensional measurements carried out as part, called phase A1, of a key comparison in the pressure ran ...

6. Case Against Optical Gauge Block Metrology
Published: 9/1/1998
Authors: Theodore D Doiron, Dennis S Everett, Bryon S. Faust, Eric S Stanfield, John Richard Stoup
Abstract: The current definition of length of a gage block is a very clever attempt to evade the systematic errors associated with the wringing layer thickness and optical phase corrections. In practice, there are very large systematic operator and surface eff ...

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 ...

8. Early Results From the NIST M48 CMM in the New AML Facility
Published: 3/3/2006
Authors: John Richard Stoup, Bryon S. Faust, Theodore D Doiron
Abstract: The Advanced Measurement Laboratory at NIST in Gaithersburg has already provided real, measurable improvement in some dimensional metrology measurement processes at NIST, most notably in the performance of the NIST Moore M48 coordinate measuring mach ...

9. Enhanced Capabilities of the NIST Fiber Probe for Microfeature Metrology
Published: 1/1/2006
Authors: Balasubramanian Muralikrishnan, Jack A Stone Jr., John Richard Stoup
Abstract: We have previously reported work in the area of fiber probe development at NIST for micro feature measurement. This probe, which we refer to as the Fiber Deflection Probe, functions by optically imaging the stem from two orthogonal directions a few m ...

10. Fiber Deflection Probe Uncertainty Analysis for Micro Holes
Published: 1/1/2006
Authors: Balasubramanian Muralikrishnan, Jack A Stone Jr., John Richard Stoup
Abstract: We have recently reported on a new probe, the Fiber Deflection Probe (FDP), for diameter and form measurement of large aspect ratio micro-holes (100 um nominal diameter, 5 mm deep). In this paper, we briefly review the measurement principle of the FD ...

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