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Standard Reference Materials: Infrared Transmittance Standards--SRM's 2053, 2054, 2055, and 2056

Published

Author(s)

Simon G. Kaplan, Leonard M. Hanssen

Abstract

Standard Reference Materials 2053, 2054, 2055, and 2056 are transmission filters designed to have nominally neutral attenuation over the 2 mm to 25 mm wavelength region, with optical densities near 1, 2, 3, and 4, respectively. The filters are made of polished single-crystal Si substrates, 25 mm in diameter and 0.25 mm in thickness, with thin Ni:Cr or Cu:Ni coatings appropriate for the given attenuation level. They are intended to be used for checking the accuracy of the ordinate scale of infrared spectrophotometers. The regular spectral transmittance of each filter has been measured with 8 cm-1 resolution using an FT-IR spectrophotometer. The uncertainty in transmittance of each filter has been determined, including both type-A (statistical) and type-B (systematic) components.
Citation
Special Publication (NIST SP) - 260-123
Report Number
260-123

Keywords

attentuation, FT-IR spectrophotometer, infrared filter, optical density, transmittance, uncertainty analysis

Citation

Kaplan, S. and Hanssen, L. (2001), Standard Reference Materials: Infrared Transmittance Standards--SRM's 2053, 2054, 2055, and 2056, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD (Accessed February 21, 2024)
Created May 1, 2001, Updated October 16, 2008