Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Projects/Programs

Displaying 1 - 18 of 18

Metrology of Dim Light Sources

Luminescent tags are molecular highlighters. They enable light-based biological assays, visualize biological processes, and are used as diagnostic and

Quantitative Information from Images

Photographs, or optical light images, are spatial records of light reflected or emitted from objects. Thus, they are prospective light measurements. In many

Night Vision Goggle Gain Calibration

NIST cooperates with the three services (Air Force, Navy, and Army) to realize a uniform night vision goggle (NVG) calibration system with low measurement

Aperture area measurements

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

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

Ocean Color

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

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

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

Remote Sensing Laboratory

The Remote Sensing Laboratory comprises spectral radiance and irradiance sources, filter and hyperspectral radiometers, and an environmental chamber that are

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 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