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Optical Metrology Portal

Programs and Projects
Nano-Structured Optics and Optical Surface Metrology

Aspheric, free-form, and nano-structured surfaces are indispensable in high-performance optical systems. The ability to accurately manufacture … more

CODATA values of the fundamental constants

Every four years, the Committee on Data for Science and Technology (CODATA) issues recommended values of the fundamental physical constants. The … more

Precision Measurement Grants Program

Since 1970, the National Institute of Standards and Technology (NIST) has awarded Precision Measurement Grants to faculty members of U.S. … more

Lunar spectral irradiance and radiance (LUSI)

LUnar Spectral Irradiance and radiance (LUSI) is a proposed suite of instruments to radiometrically characterize the Moon for use as an on-orbit … more

Geostationary Operations Environment Satellite R-Series Program (GOES-R) Extreme UV/X-ray Irradiance Sensor (EXIS) Calibration

Calibrations of the The Extreme ultraviolet/X-ray Irradiance Sensor (EXIS), which will be installed on the Geostationary Operations Environment … more

Bilateral Comparison of Spectral Responsivity in the Vacuum-Ultraviolet

To compare the calibration capabilities for the spectral responsivity in the vacuum-ultraviolet spectral region between 135 nm and 250 nm, PTB and … more

Instruments
Primary optical watt radiometer (POWR) facility

POWR is a cryogenic electrical substitution radiometer that serves as the Nation's optical power reference. more

Synchrotron Ultraviolet Radiation Facility SURF III

The Synchrotron Ultraviolet Radiation Facility SURF III is operated by the National Institute of Standards and Technology NIST as a stable light … more

Bidirectional optical scattering facility

Goniometric optical scatter instrument (GOSI) The bidirectional reflectance distribution function (BRDF) quantifies the angular distribution of … more

Beamline 2: Spectrometer Calibrations

Absolute irradiance calibrations based on the calculability of synchrotron radiation are performed on beamline 2. more

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