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Optical Metrology Portal

Programs and Projects
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

Degradation of extreme-ultraviolet optics

Optical systems that operate at wavelengths in the ultraviolet (UV) and extreme-ultraviolet (EUV) are susceptible to degradation by a number of … more

Metrology for extreme ultraviolet lithography

Much of the activity of the UV Physics Group is aimed at supporting the R&D effort by the microelectronics industry to develop Extreme … more

Vacuum-Ultraviolet Optical Properties of Cryogenic Water Ices

The optical properties of cryogenic water ices in the vacuum-ultraviolet spectral range are studied. more

Extreme Ultraviolet Detector Calibration Service

The extreme ultraviolet detector (EUVD) calibration service disseminates the U.S. national scale of detector responsivity in the wavelength range … more

EUV Zone Plates for Compact Solar Radiometers

This project is developing zone plate technology to enable compact solar radiometers for observing the solar 30.4-nm emission from ionized helium … more

Synchrotron Ultraviolet Radiation Facility SURF III

The Synchrotron Ultraviolet Radiation Facility SURF III is operated by the Ultraviolet Radiation Group as a stable light source for radiometry and … more

Ultraviolet Spectral Power Responsivity Scale Realization

The NIST spectral power responsivity scale is based on cryogenic electrical substitution radiometers (ESRs) , which are considered the highest … more

Beamline 2: Spectrometer Calibrations

Absolute irradiance calibrations based on the calculability of synchrotron radiation are performed on beamline 2. See GOES-R/EXIS and SDO as … more

Primary optical watt radiometer (POWR) facility

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

Bidirectional optical scattering facility

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

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