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Optical Technology Portal

Programs and Projects
Applied spectroradiometry and imaging metrology

Spectroradiometers are widely used for acquiring colorimetric, photometric, and radiometric quantities with a single measurement for a variety of … more

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 … more


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

In Situ Measurement Techniques

Synthetic cell membrane constructs allow the simplification and complete control of a more complicated cellular system, as well as the … more

State-resolved Biomolecular Spectroscopies

Sensitive and fully state resolved spectroscopic methods in the terahertz (THz) and ultraviolet (UV) regions are being developed to investigate … more

Terahertz Imaging and Sources

Imaging in the terahertz frequency range enables the detection of concealed weapons and other contraband (e.g., explosives under clothing) without … more

Transfer spectrophotometer

A Perkin-Elmer Lambda 1050 spectrophotometer is used to complement the reference instruments. It performs this function by measuring samples … more

Reference transmittance spectrophotometer

The Reference Transmittance Spectrophotometer (RTS) is the national reference instrument for regular spectral transmittance measurements of … more


STARR is the national reference instrument for spectral reflectance measurements of spectrally neutral, non-fluorescent samples at room … more

Continuous-wave terahertz spectrometer

The continuous-wave terahertz spectrometer makes use of two near-infrared lasers. The first laser is a fixed-frequency cw ring Ti:Saph laser … more

Primary optical watt radiometer (POWR) facility

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

Lunar spectro-radiometer

Design of the lunar irradiance instrument is based on commercially available spectrographs. These spectrographs can be stable and sub-components … more

jb95 Spectral fitting program

A graphical user interface program, JB95 , based on a Windows 95 © API platform has been written in the C programming language to aid in the … more


SCATMECH is an object-oriented C++ class library developed to distribute models for light scattering applications. Included in the library are … more

Modeled integrated scattering tool (MIST)

The MIST program has been developed to provide users with a general application to model an integrated scattering system. The program performs an … more

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