NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
NORAMET Comparison of Gauge Block Measurement by Optical Interferometry
Published
Author(s)
Jennifer Decker, A Lapointe, John R. Stoup, M V. Alonso, J R. Pekelsky
Abstract
A varied assortment of 47 new and used steel, ceramic, chromium carbide and tungsten carbide gauge blocks from 9 manufacturers, ranging in length from 05. mm to 101.6 mm were calibrated by four laboratories from the NORAMET countries using the method of optical interferometry. Measurements of central length of the gauge blocks are compared. The data are utilized as a test-bed to illustrate the outcome of two different techniques with potential for application in the comparison of national metrology institute (NMI) calibration services.
Decker, J.
, Lapointe, A.
, Stoup, J.
, Alonso, M.
and Pekelsky, J.
(1999),
NORAMET Comparison of Gauge Block Measurement by Optical Interferometry, Metrologia
(Accessed October 10, 2025)