James A. Fedchak, Adriaan C. Carter, Raju V. Datla
The Low Background Infrared calibration (LBIR) facility at the National Institute of Standards and Technology (NIST) is developing a relative aperture area instrument to measure the areas of apertures with diameters ranging from 5 mm to 0.05 mm. NIST already has the capability of determining the absolute area of apertures with diameters larger than 0.35 mm. The goal of the LBIR facility is to achieve a standard uncertainty of better than 0.1%. We report on the current status of this effort and plans for improvement. We are near the goal for apertures larger than 0.350 mm.
Aperture Area Measurement, blackbody, calibration, LBIR, radiometry
, Carter, A.
and Datla, R.
Measurement of Small Apertures, Metrologia, [online], https://doi.org/10.1088/0026-1394/43/2/S09, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=840990
(Accessed August 19, 2022)