DEVELOPMENTS AT NIST Researchers at the National Institute of Standards and Technology (NIST) are working on the following technology. For further information, contact: Mary Clague, telephone (301)-975-4188, e-mail
[email protected], or National Institute of Standards and Technology, Technology Partnerships Division, 100 Bureau Drive, Stop 2200, Gaithersburg, Maryland 20899; Fax: 301-869-2751. This is not an announcement of a contract action or a grant. NIST DOCKET NUMBER: 03-009US Title: Spectrally Tunable Solid-State Light Source This technology provides a radiometrically stable, spectrally tunable, solid-state source. The radiometric outputs of individually controlled, narrow bandwidth, solid-state sources with different spectral distributions are combined in an integrating sphere to approximate any desired spectral distribution. Utilizing a sufficient number of independent solid-state source channels, the source can be tuned to approximate the spectral distribution of any desired source distribution. A stable reference spectroradiometer that is integrated into the solid-state light source measures the spectral radiance and is used to adjust the output of the individual channels.