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Metrology

Optical / photometry / laser metrology

Tools and Instruments

Keyword

Organizational Unit

Primary optical watt radiometer (POWR) facility

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

Radiance temperature calibration laboratory

Radiance Temperature Calibration Laboratory is used for the calibration of radiation thermometers, tungsten-strip lamps and heat flux gauges.

Reference Integrating Sphere for Spectral Reflectance

The reference integrating sphere performs directional-hemispherical reflectance measurements of spectrally neutral, non-fluorescent samples at room temperature

Reference Transmittance Spectrophotometer (RTS)

The Reference Transmittance Spectrophotometer (RTS) is the national reference instrument for regular spectral transmittance measurements of non-fluorescent

Robotic Optical Scattering Instrument (ROSI)

ROSI performs specular and bidirectional reflectance measurements of spectrally neutral, non-fluorescent specular and diffuse samples at room temperature. It

Plot of Si photodiode typical responsivity in EUV

Si EUV Photodiode Transfer Standard

Silicon (Si) photodiodes are issued by NIST as transfer standard detectors throughout the extreme ultraviolet spectral region (5 nm to 254 nm). Each device is

SIRCUS facility and uncertainties

The basic SIRCUS calibration setup is shown at the right. The output from a tunable laser is sent through an intensity stabilizer, then through a 'speckle

Spectral comparator facilities

Visible to near-infrared spectral comparator facility (Vis/NIR SCF) The Vis/NIR SCF is a monochromator-based system that typically measures the spectral power

Spectrally tunable lighting facility

Solid-state lighting (SSL) is increasingly being introduced into the market and it is expected that many of the light sources currently used for general

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 research

System for infrared spectral emittance of materials

This facility enables the measurement of spectral emittance using the direct method of radiance comparison of the sample with a blackbody reference source

Telescope calibration facility (TCF)

The Telescope Calibration Facility (TCF) was designed to support the NIST Stars project by providing a facility to radiometricly calibrate long focal length

Transfer spectrophotometer

A Perkin-Elmer Lambda 1050 spectrophotometer is used to complement the reference reflectance and transmittance instruments. It performs this function by

NIST Ultraviolet Scale Realization Facility

Ultraviolet Scale Realization Facility UV SRF

A new facility has been commissioned to the establish ultraviolet spectral power responsivity in the air-ultraviolet spectral range between 200 nm and 400 nm