Spectroradiometer: An instrument for measurement of radiometric quantities in narrow wavelength
intervals over a given spectral region (e.g. irradiance, radiance, etc.) (CIE)
The optical quantity measured by a spectroradiometer system is determined by the input optic employed, as
described in the table below. An appropriate calibration source is required in each case. Bentham manufactures
spectroradiometers covering the spectral range 150nm to 30000nm. All photometric, colorimetric, UV radiometric
etc. quantities are most accurately determined by performing spectroradiometric measurements and using
software to integrate/weight values as defined by CIE etc. However, Bentham also supplies a range of filter based
rediometers/photometers with close match spectral responses for simple integral type measurements.
Typically a light source and UMS, universal measurement station, is added to spectroradiometer type systems in
order to perform spectrophotometric measurements such as transmission and reflectance.