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Physical Measurement Laboratory / Sensor Science Division

Optical Radiation Group

Projects/Programs

Displaying 26 - 32 of 32
lamp/plaque method

Remote Sensing Laboratory

Ongoing
The Remote Sensing Laboratory (RSL) is designed to address Earth-oriented remote sensing radiometry for the spectral region from the ultraviolet (UV) to the short wave infrared (SWIR), or 250 nm to 2500 nm. For spectral radiance, several lamp-illuminated integrating sphere sources are arranged
Solar Flare

SDO/EVE/ESP Calibration

Ongoing
The SDO satellite is the first mission in NASA's Living With a Star program, which aims to understand the connections between the Sun and Earth. In addition to the light and heat with which we are familiar, the Sun produces x-ray radiation, extreme ultraviolet light, and the solar wind which
LED examples

Solid-state lighting metrology

Ongoing
Light Emitting Diodes (LEDs) are increasingly being introduced into lighting market, and solid state lighting (SSL) is becoming a reality. But, this new technology still faces many challenges. Lighting consumes a huge amount of energy, currently 22% of all electricity consumed in the U.S. White LED
spectral responsivity lab

Spectral responsivity measurement

Ongoing
The spectral responsivities of typical photodiodes that are used in the ultraviolet, visible, and near-infrared and calibrated by the SCFs are shown below. **Any commercial equipment, instruments, or materials mentioned are identified to foster understanding. Such identification does not

Spectroradiometry of sources

Ongoing
The spectral radiance sources in the form of tungsten-strip lamps and integrating-sphere sources are calibrated in the Facility for Spectroradiometric Calibrations (FASCAL). The measurements are performed by the use of a prism-grating double monochromator whose spectral radiance responsivity is
Reflectance-type silicon trap-detectors

Transfer and working standard radiometers and photometers

Ongoing
Reflectance-type silicon trap-detectors – Silicon trap-detectors have been developed for use as transfer standards for the IR-SIRCUS and IR-Laser Scatter and Detector Characterization facilities. They are built using either Hamamatsu S6337 or S1337 photodiodes. UV silicon trap-detectors have also

Vision science

Ongoing
NIST has been providing physical measurement standards in photometry and colorimetry for many years. However, the definitions of photometric and colorimetric units and standards are often questioned or found to be insufficient for modern lighting technologies. Large discrepancies between