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Radiation thermometers and blackbodies can be calibrated using a set of blackbodies. These blackbodies can vary in size and can be fixed-points of the ITS-90 or
Aluminum oxide (Al 2O 3) photodiodes are issued by NIST as transfer standard detectors in the extreme ultraviolet spectral region (5 nm to 125 nm). Each device
Beamline 1 separates a swath of light from the synchrotron into two parts. The first part is collected in Beamline 1a by a normal-incidence multilayer mirror
Absolute source-based radiometry is founded in the traceability of a light source’s output to measurable operational parameters. The absolute irradiance at BL-2
The extended range monochromator is based on a unique design that allows illumination of the gratings in both grazing and normal incidence, thus covering the
Beamline 4 is a general purpose radiometric beamline consists of a 2 m monochromator to disperse radiation from SURF III. An Absolute Cryogenic Radiometer (ACR)
Beamline 5 of the Synchrotron Ultraviolet Radiation Facility is a diagnostics end-station used to determine the transverse size of the stored electron beam. The
The NIST/DARPA EUV Reflectometry facility began in the late 1980's to make measurements of the reflectivity of EUV multilayer optics for lithography. Since then
Beamline 8 is used to study the degradation of surfaces that are irradiated by EUV radiation in the presence of common outgas species. Its multilayer mirror
Goniometric optical scatter instrument (GOSI) The bidirectional reflectance distribution function (BRDF) quantifies the angular distribution of radiation
NIST developed the BMDO transfer radiometer (BXR) to calibrate small-aperture blackbodies for the test facilities of the Missile Defense Agency (MDA). In
In 1993, the United States Congress directed the U.S. Department of Transportation to establish "a standard for a minimum level of retroreflectivity that must
The NIST Physical Measurement Laboratory has established the color and appearance metrology facility to support calibration services for 0°/45° colored samples
A custom instrument, the Complete Hemispherical infrared Laser-based Reflectometer (CHILR), employs a gold integrating sphere and is used for the measurement of
The continuous-wave terahertz spectrometer makes use of two near-infrared lasers. The first laser is a fixed-frequency cw ring Ti:Saph laser operating near 840
FASCAL 2 facility is solely dedicated to spectral irradiance scale realizations and calibrations. The spectral irradiance standards are calibrated using a high
The FASCAL has been in continuous operations since 1970s for the calibrations of spectral radiance of sources. The measurements are performed by the use of a
The Fourier transform infrared spectrophotometry (FTIS) facility serves as the measurement facility for characterizing the optical properties of materials in
An integrating-sphere system has been designed and constructed for the measurement of multiple optical properties in the infrared spectral range. The absolute
The Low background infrared (LBIR) facility was originally designed to calibrate user supplied blackbody sources and to characterize low-background IR detectors
Design of the lunar irradiance instrument is based on commercially available spectrographs. These spectrographs can be stable and sub-components are readily
The Missile Defense transfer Radiometer (MDXR) is a cryogenic transfer radiometer for providing calibrations of collimated infrared beams in users' cryo-vacuum
The NIST gonio-spectroradiometer is used to measure total spectral radiant flux (TSRF) of incandescent lamps. The instrument consists of a 3-axis scanning