Our goal is to provide world-class engineering metrology resources to the U.S. manufacturers. This web site is one of an array of mechanisms we make available to our customers to help them achieve high-accuracy dimensional measurements traceable to national and international standards. We hope you will find it to be a useful aid that improves your measurement capabilities.

Currently the web site has two computational tools. The first tool is for calculating the index of refraction of air, which is needed for interferometric length measurements. The second tool is for calculating the elastic compression of spheres and cylinders at point and line contact, which can enable the user, for example, to correct for elastic deformations when measuring a part with a contacting probe. The calculations are implemented for 16 different contact geometries.

Web Site Home: Engineering Metrology Toolbox
Technical Inquiries: Daniel S. Sawyer, Group Leader
Dimensional Metrology
Sensor Science Division
Physical Measurement Laboratory
NIST, 100 Bureau Drive, Stop 8211, Gaithersburg, MD 20899-8211

The National Institute of Standards and Technology (NIST) is an agency of the U.S. Department of Commerce.
NIST / PML / Sensor Science Division

NIST Program Questions: Public Inquires Unit
(301) 975-NIST (6478) TTY (301) 975-8295
NIST, 100 Bureau Drive, Stop 3460, Gaithersburg, MD 20899-3460

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Date Created: Friday, November 5, 2004
Last Updated: Wednesday, June 7, 2023
Technical Web Site Questions: Wei Ren
Feedback and Comments: Webmaster