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Physical Measurement Laboratory / Sensor Science Division

Optical Radiation Group

Projects/Programs

Displaying 1 - 18 of 18
SRMs

Aperture area measurements

Radiometric and photometric measurements require defining apertures. The accuracy to which these measurements can be accomplished requires minimization of the
color and appearance diagram

Color and appearance

We are developing instrumentation, standards artifacts, and measurement protocols to characterize appearance attributes including color, texture, and gloss

Detector metrology

High performance optical radiometers with selected optical detectors are being designed, characterized, and calibrated in the Optical Radiation Group for the

Detector-based color scale

Until recently calibrations of tristimulus colorimeters were performed against lamp standards. However, the uncertainty of these source-based calibrations
Figure 1. Class of optical setup considered in this work. The aperture can be limiting (as shown in this case) or nonlimiting.

Diffraction effects in radiometry

We want to quantify the breakdown of geometrical optics when computing the throughput of optical systems for the purpose of calculating "diffraction corrections

Molecular spectroscopy

The molecular spectroscopy sub-group carries out vibrational and rotational spectroscopic analyses on experimental data obtained primarily in the infrared (IR)
underwater view of MOBY

Ocean Color

Ocean color radiometry provides essential information about phytoplankton concentration and dissolved organic matter, and hence about primary productivity

Optical medical imaging

The Optical Medical Imaging project was established to advance the application of optical imaging in surgical, clinical, and medical practices. Our goal is to
NIST standard photometer and NIST issued luminous intensity standard lamp.

Photometry

The purpose of photometry is to measure light in a way that takes the sensitivity of human visual system into account. While radiometry measures light in all
radiation thermometry

Radiation Thermometry

Calibration standards for radiation thermometry are disseminated in the form of radiation thermometers, tungsten strip lamps and blackbodies. These disseminated
LED examples

Solid-state lighting metrology

With the rise of new, energy-efficient solid-state lighting (SSL) systems has come the need for new performance metrics and measurement methods to address their
spectral responsivity lab

Spectral responsivity measurement

NIST provides calibration of the spectral responsivity and spatial uniformity of photodetectors for use in industrial and government labs. These calibrations

Spectroradiometry of sources

Calibration standards for spectral radiance and spectral irradiance are disseminated in the form of transfer lamps and integrating sphere sources. These

Vision science

The Vision Science program was established to develop new photometric and colorimetric standards based on vision science to facilitate development of emerging